bluuebunny/crossref_metadata_2025 huggingface dataset:
PREPARATION OF CUBIC C3N4 THIN FILMS BY LOW-PRESSURE PLASMA ENHANCED CHEMICAL VAPOR DEPOSITION
Authors: ZHANG ZHI-HONG  , GUO HUAI-XI  , YU FEI-WEI  , XIONG QI-HUA  , YE MING-SHENG  , FAN XIANG-JUN  ,   武汉大学物理系，武汉  430072
Published: November 2020

Cubic C3N4 was synthesized on glass and silicon wafers by using low-pressure plasma enhanced chemical vapor deposition and silicon nitride interlayer technology.The crystalline structure was investigated by transmission electron microscopy (TEM),and this material has body centered cubic symmetrical structure.The lattice parameter a=0.536 nm determined by TEM is comparable to theoretical data 0.53973nm.The C1s and N1s binding energies are 285.01 and 398.60eV respectively,and the nitrogen content of the film is up to 42.96%,determined by X-ray photoelectron spectroscopy (XPS).The thin films on glass are transparent to light in the visible and near infrared region,and at 400 nm there appears strong light absorption.
THE FEATURES OF GROUND STATES IN THREE-ELECTRON QUANTUM DISKS
Authors: XIE WEN-FANG  , CHEN CHUAN-YU  ,   广州师范学院物理系，广州  510400
Published: November 2020

By use of the method of few-body physics, we study the relations between the energy of ground state and the thickness of three-electron quantum disk in a magnetic field. As the thickness increases, the magic number angular momentum states of three-electron(i.e., the states of fractional quantum Hall effect) will be destroyed. The results show the thicknesses of quantum disks whose magic number angular momentum is destroyed decrease as the magnetic fields increase.
EVOLUTION OF ULTRA-INTENSE LASER FIELD IN PLASMA
Authors: ZENG GUI-HUA  , XU ZHI-ZHAN  ,   中国科学院上海光学精密机械研究所，上海  201800
Published: November 2020

The propagation of ultra-intense short laser pulse in uniform underdense plasma has been investigated.The evolution equation and the nonlinear envelope equation were derived.Based on these derived equations,the characteristics of the relativistic harmonics saturation and the laser envelope evolution are discussed.
QUASI-CLASSICAL TRANSPORT OF TWO-DIMENSIONAL BLOCH ELECTRONS UNDER ELECTRIC AND MAGNETIC FIELDS
Authors: CHEN YI-QIAO  , LEI XIAO-LIN  ,   中国科学院上海冶金研究所信息功能材料国家重点实验室，上海  200050
Published: November 2020

We present a theoretical study of quasi-classical transport of two-dimensional Bloch electrons under the influence of an electric and a magnetic fields, starting respectively from the quasi-classical equation of motion of electrons and from the balance equations proposed by one of the authors. The electron longitudinal velocity vx and the Hall drift velocity vy are calculated as functions of the magnetic field under different strengths of the applied electric field. It is shown that both vx and vy always change continuously with variation of magnetic field. No sudden jump in the vx-B or the vy-B curve has been found at any given electric field, in contradiction with the claim made in a recent paper published in Acta Physica Sinica (vol. 46). The possible cause for this disagreement is discussed. Furthermore, we point out that the validity of the naive way to study electron transport by directly introducing a damping force into the quasi-classical equation of motion of electron is quite limited.
AN ALTERATIVE METHOD OF ADIABATIC VARIATIONAL CALCULATION OF HYDROGEN ENERGY IN A STRONG MAGNETIC FIELD
Authors: SHI YU-ZHU  , LI LI-PING  , LI YU-CHENG  ,   (1)辽宁大学电子科学与工程系，沈阳  110036; (2)辽宁大学物理系，沈阳  110036
Published: November 2020

In this article,by using the adiabatic approximation and variational principle and introducing an effective potential we have computed some energy levels of hydrogen atom in the presence of a strong magnetic field(1≤β≤2000) and compared our results with the like multi-configuration Hartree-Fock method.We found a basic function with better convergence than the Landau function.
QUANTUM BEAT LASER:TWO-MODE SUB-POISSONIAN LIGHT
Authors: HU XIANG-MING  , PENG JIN-SHENG  ,   (1)华中师范大学物理系，武汉  430079; (2)华中师范大学物理系，武汉  430079;华中师范大学应用物理研究所，武汉  430079
Published: November 2020

It is shown that the Λ quantum beat system, into which a new atomic coherence is introduced, can produce bright two-mode sub-Poissonian light. The Mandel Q parameter is calculated using Scully-Lamb theory. On one hand, when quantum noises of the relative amplitude and relative phase drop to vaccum noise levels, the average mode exhibits sub-Poissonian photon distribution; when quantum noises of the average amplitude and average phase drop to vaccum noise levels, the relative mode exhibits sub-Poissonian photon statistics; the optimum Mandel Q parameter is -0.5. On the other hand, in the above two cases, each of the correlated spontaneous emission laser modes exhibits sub-Poissonian photon statistics with optimum Mandel Q parameter of -0.25.
STUDY OF THE STRIPED TEXTURE IN THE POLYMER NETWORK STABILIZED FERROELECTRIC LIQUID CRYSTAL CELLS
Authors: LI JIAN-JUN  , WANG ZONG-KAI  , LING ZHI-HUA  , IAN YAN-QING  , HUANG XI-MIN  ,   (1)吉林大学化学系，长春  130061; (2)中国科学院长春物理研究所，长春  130021
Published: November 2020

A monomer with reactive diacrylate was mixed with a commercial ferroelectric liquid crystal(FLC) mixture and polymerized under U.V. irradiation together with the application of an electric field of ±50V and 10Hz to obtain polymer network stabilized ferroelectric liquid crystals(PNSFLC). Polarized microscope and scanning electron microscopy(SEM) were used to study the molecule texture and the polymer network structure. It is found that the polymer network formed in the SmC phase is anisotropic and fibrils-like , and the PNSFLC cell shows a striped texture. The striped texture is explained by the elastic free energy theory.
FORMATION OF GaAs UNIFORM DOT STRUCTURES GROWN BY MBE ON PATTERNED SUBSTRATES
Authors: NIU ZHI-CHUAN  , ZHOU ZENG-QI  , WU RONG-HAN  , FENG SONG-LIN  , R.NOETZEL  , U.JAHN  , K.H.PLOOG  ,   (1)Paul-Drude-Institut For Solid State Electronics,Hausvogteiplatz 5-7,D-10117,Germany; (2)中国科学院半导体研究所，北京  100083
Published: November 2020

Uniform triangular dots (TDs) and ridge dots (RDs) structures are grown by moleculat beam epitaxy (MBE) on square mesa and hole patterned (311)A substrates. The surface morphology and cross-sectional characterization of the dot structures investigated by atomic force microscopy(AFM) and scanning electron microscopy(SEM) show that the TDs and RDs structures are formed on the hole and mesa patterned areas during the growth. TDs are one-side pinch-off structure evaluated between the holes with highly uniform tips along ［233］ direction, and the RDs two-side pinch-off structure accomplished on the mesa with ordered two opposite tips, respectively. The AFM line-scan height profiles of the dots structures indicate that the TDs and RDs structures are dominated by the Ga adatoms preferential migration from symmetric (331)A side walls of the mesa and holes to the bottom region to develop the triangular shaped tips structure, while the facet orientation of the tips is determined by the original side walls orientation of the mesa and hole to lead to form uniform pinch-off arrays. The cathode luminescense measurements reveal that the line,dot,ring-like lateral variations of quantum well confinement energies are formed in the regions of the TDs and RDs structures. These unique growth phenomenon provides a good possibility to realize three-dimensional quantum confinement structures by using MBE growth on (311)A substrates with much smaller length scale of patterning.
HIGH-FIELD ELECTRON TRANSPORT OF AMORPHOUS SiO2 AS ACCELERATING LAYER IN THE LAYERED OPTIMIZATION TFEL
Authors: LOU ZHI-DONG  , XU ZHENG  , XU CHUN-XIANG  , YU LEI  , TENG FENG  , XU XU-RONG  ,   (1)北方交通大学物理系，北京  100044; (2)北方交通大学物理系，北京  100044;中国科学院长春物理研究所激发态物理开放研究实验室，长春  130021; (3)天津理工学院材料物理研究所，天津  300191
Published: November 2020

Amorphous SiO2 is used as the accelerating layer in the layered optimization thin film electroluminescent devices. In this paper we discuss the effects of high electric fields on the transport of electrons in amorphous SiO2. The energy differences between two localized states in the vicinity of the Fermi level or in the tail of the conduction band are lowered due to high electric fields. Therefore, electron transport in these localized states is in the form of thermally-assisted hopping conduction strengthened by electric fields. Based on the experimental data we calculate the average mobility value of electrons in the conduction band, the minimum metal conductivity and the densities of states near the Fermi level and the mobility edge.
MICROSTRUCTURE OF SILICON NITRIDE THIN FILM
Authors: CHEN JUN-FANG  , WANG WEI-XIANG  , LIU SONG-HAO  , REN ZHAO-XING  ,   (1)华南师范大学量子电子研究所，广州  510631; (2)华南师范大学物理系，广州  510631; (3)中国科学院等离子体物理研究所，合肥  230031
Published: November 2020

The microstructure of silicon nitride thin film prepared by ECR-PECVD is studied by transmission electron microscopy (TEM), scanning tunnel microscopy (STM) and PDS microphotometer. The results indicate that the Si3N4 thin film prepared by ECR-PECVD at lower temperature is the nano-Si3N4 thin film , the crystalline grain size lies between 14 to 29nm ,and this kind of Si3N4 thin film has fine surface planeness. We analyzed the mechanism of the formation of crystalline Si3N4 thin film at lower deposition temperature.
MICROSTRUCTURE CHARACTERISTICS AND THE GRAVITY INFLUENCE FOR UNIDIRECTIONALLY SOLIDIFIED Zr65Cu17.5Ni10Al7.5 ALLOY
Authors: LIU RI-PING  , ZHAO JIAN-HUA  , ZHANG XIANG-YI  , HE DUAN-WEI  , XU YING-FAN  , WANG WEN-KUI  ,   (1)中国科学院物理研究所，北京  100080; (2)中国科学院物理研究所，北京  100080；燕山大学材料工程学院，秦皇岛  066004
Published: November 2020

This paper studies the phase morphologies of glass-forming Zr65Cu17.5Ni10Al7.5 alloy during unidirectional solidification, as well as the gravity influence on them. The direction of the microstructure became worse when the moving speed of the furnace exceeded a critical value. This critical speed was about 5mm/min for Zr65Cu17.5Ni10Al7.5 alloy in the present experiments. Different relationship between the direction of the movement of the solid-liquid interface and the gravity field led to different states of buoyancy convection, and finally different phase morphologies were obtained. When the movement direction was the same as the gravity vector, the primary phase was less and finer without an evident transition region in front of the interface. However, when the two directions were opposite to each other, more and coarser primary phase was obtained with an evident transition region appearing in front of the interface.
DIODE PUMPED Nd∶YVO4 LASER EMITTING AT 1342nm AND 671nm
Authors: ZHANG HENG-LI  , HE JING-LIANG  , CHEN YU-CHUAN  , HOU WEI  , LIU RONG  , FENG BAO-HUA  , XU ZU-YAN  , WANG JIAN-MING  , WU XING  , WU BAI-CHANG  , CHEN CHUANG-TIAN  ,   (1)中国科学院福建物质结构研究所，福州  350002; (2)中国科学院物理研究所，北京  100080; (3)中国科学院物理研究所光物理开放研究实验室，北京  100080
Published: November 2020

We report here a diode pumped Nd∶YVO4 laser emitting at 1342 and 671nm.A maximum output power of 1.75W at 1342nm was obtained under an incident pump power of 5.45W,with an optical-to-optical conversion efficiency of up to 32.1%.With a type Ⅰ noncritically phase-matched LBO crystal as the intracavity frequency doubler,over 500mW of 671nm light was obtained at 6W of incident pump power,the optical-optical conversion efficiency being 8.3%.The output power fluctuates less than 5% while the temperature change of the LBO crystal oven was maintained ±0.5℃ at the phase-matched temperature.
MOLECULAR DYNAMICS STUDY ON THE STRUCTURES OF MOLTEN Rb2ZnCl4
Authors: CHENG ZHAO-NIAN  , DING  HONG  , LEI YU  ,   中国科学院上海冶金研究所，上海  200050
Published: November 2020

The structures of molten and crystalline states of Rb2ZnCl4 have been simulated by molecular dynamics with the effective potentials which had been applied in the simulations of RbCl and ZnCl2 systems.Six radial distribution functions (RDF) simulated are presented,of which Zn-Cl and Rb-Cl RDFs are in good accordance with the recent EXAFS experimental results.Based on the instantaneous configurations given by the simulations,the local structures in molten and crystalline states have been studied with bond-order parameter method.The results show that the Zn atom and its neighboring Cl atoms form a stable tetrahedral structure,and the Zn/Cl tetrahedral structures in molten Rb2ZnCl4 are stabler than those in molten ZnCl2.The presence of a good quantity of stable (ZnCl4)2- units without apparent network-like structures is the typical characteristics of the molten Rb2ZnCl4.The simulations for crystalline state did not describe the complex coordinations between Rb and Cl atoms in detail,which showed that the two-body effective potentials are not enough to simulate the behaviors of Rb atoms in the crystalline Rb2ZnCl4.
GROWTH OF LARGER SIZE C60 AND C70 SINGLE CRYSTALS BY NUCLEATION CONTROL
Authors: ZHOU WEI-YA  , CHANG BAO-HE  , QIAN LU-XI  ,   中国科学院物理研究所，中国科学院凝聚态物理中心，北京  100080
Published: November 2020

Larger size C60 and C70 single crystals up to 6mm and 5mm in length, respectively, have been grown by nucleation control, employing an improved double-temperature-gradient furnace. The morphology and the crystal structure of these large crystals were investigated.
THERMAL DARK SPATIAL OPTICAL SOLITONS UNDER EVEN BOUNDARY CONDITION
Authors: LU HONG  , YANG KUN  , XU JIAN-DONG  , LI CHUN-FEI  , HONG JING  ,   哈尔滨工业大学应用物理系，哈尔滨  150001
Published: November 2020

An experimental setup is designed to stimulate thermal dark spatial optical solitons under even boundary condition, and the experiment in chlorophyll acetone is introduced in the paper. Finally, the quantum effect of dark spatial optical solitons is discussed.
MOLECULAR BEAM EPITAXIAL GROWTH AND STRUCTURE OF COBALT FILM ON GaAs(001) SURFACE
Authors: WU YI-ZHENG  , DING HAI-FENG  , JING CHAO  , WU DI  , LIU GUO-LEI  , DONG GUO-SHENG  , JIN XIAO-FENG  ,   复旦大学应用表面物理国家重点实验室，李政道物理学综合实验室，上海  200433
Published: November 2020

By using in-situ reflection high energy electron diffraction, the epitaxial growth of Co films on GaAs(001) surface is studied. When the growth temperature was 150℃, the growth process of Co films can be divided into three stages. The crystal structure of the first 3nm of the Co film is body-center-cubic(bcc) metastable phase. Then the next 4nm film is a complicated polycrystalline phase. After the thickness exceeds 7nm, the Co film is a single-crystalline hexagonal-close-packed(hcp) stable phase. This new result clears up the controversy in former experiments about the structure of the Co epilayer, and establishes, for the first time to our knowledge, a clear physical picture of the epitaxial growth of Co films on GaAs(001).
FIRST-PRINCIPLES VIRTUAL-CRYSTAL CALCULATIONS OF GaxAlyIn1-x-yN DISORDERED ALLOYS
Authors: ZHU ZI-ZHONG  , LIN GUO-XING  , HUANG MEI-CHUN  ,   厦门大学物理系，厦门  361005
Published: November 2020

The results of first-principles virtual-crystal calculations for the GaxAlyIn1-x-yN disordered alloys are presented. Electronic structures and energy gaps of the alloy with zinc blende and wurtzite structures have been studied as a function of composition (x,y) for the whole range (x,y=0 to 1). The energy gap of the alloy Eg(x,y) with a wurtzite structure has been found.
THE MOLECULAR DYNAMICS SIMULATION FOR THE STRUCTURE AND PROPERTIES OF NANOCRYSTALLINE COPPER
Authors: SUN WEI  , CHANG MING  , YANG BAO-HE  ,   天津理工学院，天津  300191
Published: November 2020

This paper presents a molecular dynamics simulation for the atomic structure of nanocrystalline copper.The density,energy distribution,X-ray diffraction patterns and radial distribution function were calculated as functions of grain size in the nanocrystal.The results show that the large volume fraction of the boundaries and the distortion of the grains make the properties of nanocrystals different from those of materials consisting of coarse grains.
STUDY OF IONIC ABUNDANCE FOR LTE PLASMAS
Authors: MENG XU-JUN  , SUN YONG-SHENG  , LONG YAN-QIN  ,   北京应用物理与计算数学研究所，北京  100088
Published: November 2020

In this paper a detailed study is performed to the ionic abundance in hot plasmas at definite temperatures and densities of matter by employing both the theory f fluctuation of entropy and Boltzmann relation on the relativistic Hartree-Fock-Slater self-consistent field average atomic model.A convolution method for fast calculation of ionic abundance is presented.The degree of ionization and ionic abundance following the changes of temperature and density of matter is discussed by taking gold as an example.
DIAMOND FILMS GROWTH ON POLYCRYSTALLINE Cu AND PHOSPHORUS DEOXIDIZED Cu
Authors: HAN SI-JIN  , CHEN JIN-SONG  , FANG RONG-CHUAN  , SHANG NAI-GUI  , SHAO QIN-YI  , LE DE-FEN  , LIAO YUAN  , YE ZHI-YUAN  , YI BO  , CUI JING-BIAO  ,   中国科学技术大学物理系，合肥  230026
Published: November 2020

Two kinds of Cu substrates were used to grow diamond films,one of them being 99.99% polycrystalline Cu foil and the other 99.95% phosphorus deoxidized Cu foil.Large-area,free-standing polycrystalline diamond films were obtained by hot filament CVD on both substrates.The diamond films on the two kinds of Cu substrates were comparatively investigated by high resolution optical microscopy,scanning electron microscopy,Raman spectroscopy,and X-ray diffraction.The quality of films on deoxidized Cu are not worse than that on polycrystalline Cu,while the nucleation densities ,growth rate and stress in film on deoxidized Cu is higher than those on polycrystalline Cu.It is indicated that the annealing process and optimized growth conditions must be used to obtain large-area continuous diamond films.
PURE STATES AND QUANTUM SYSTEMS OF BERRY TYPE
Authors: LI BO-ZANG  , HOU BANG-PIN  , YU WAN-LUN  ,   (1)四川师范大学物理系，成都  610066; (2)中国科学院物理研究所与凝聚态物理中心，北京  100080
Published: November 2020

New concepts are proposed on the pure states and quantum systems of Berry type, of which the properties and signifieance are discussed. In addition, we point out that an adiabatic system can be approximately regarded as a quantum system of complete Berry type.
A CLOSED COSMOLOGICAL SOLUTION IN SEMI-CLASSICAL BRANS-DICKE'S THEORY
Authors: BU HE  , LIU LIAO  ,   (1)北京师范大学物理系，北京  100875; (2)呼伦贝尔学院科研处，呼伦贝尔  021008
Published: November 2020

We find a closed cosmological solution for small scale factor in the semi-classical Brans-Dicke theory. The model has an initial space-like curvature singularity.
SHUBNIKOV-DE HAAS OSCILLATIONS IN PSEUDOMORPHIC MODULATION-DOPED InGaAs/InAlAs HETEROSTRUCTURE
Authors: CHEN JIAN-XIN  , LI AI-ZHEN  , REN YAO-CHENG  , K.FRIEDLAND  ,   中国科学院上海冶金研究所信息功能材料国家重点实验室，上海  200050
Published: November 2020

Shubnikov-de Haas (SdH) oscillation and quantum Hall effect measurements on pseudomorphic InGaAs/InAlAs modulation doped heterostructure,grown by gas source molecular beam epitaxy,have been carried out to investigate the magetotransport properties of the two-dimensional electron gas in the strained InGaAs quantum well.The SdH measurements at 0.3K demonstrated the existence of a quasi-two-dimensional electron gas in the pseudomorphic InGaAs/InAlAs heterostructure.The fast Fourier transformation results for the SdH data clearly indicate the occupation of two subbands in InGaAs strained quantum well.Comparison between SdH data on the structure with undoped InGaAs cap layer and the structure with heavily Si doped cap layer reveals that different doping in cap layer has large effect on the parallel conductance of the modulation doped structure.
THE GROWTH CHARACTER AND ADHESION OF CUBIC BORON NITRIDE THIN FILMS
Authors: MA XI-YING  , YUE JIN-SHUN  , HE DE-YAN  , CHEN GUANG-HUA  ,   (1)北京工业大学应用物理系，北京  100022; (2)兰州大学物理系，兰州  730000
Published: November 2020

Cubic boron nitride (c-BN) thin films were deposited on silicon,nickel,stainless steel and Ni-coated silicon substrates by hot filament enhanced plasma chemical vapor deposition (CVD).The films were characterized by infrared spectroscopy(IR), X-ray diffraction, scanning electron microscopy(SEM),and X-ray photoelectron spectra(XPS).It was found that the quality of c-BN thin films varied with deposition conditions and substrates.Under optimum conditions,thin films with high percentage of c-BN and good adhesion were deposited on Ni substrate.When sputtering a Ni interlayer on Si substrate prior to the growth,the c-BN content of the films increased and an excellent adhesion was obtained.
STATISTICAL MECHANICAL APPROACH TO CELLULAR AUTOMATON MODELS OF HIGHWAY TRAFFIC FLOW
Authors: WANG BING-HONG  , KWONG YVONNE-ROAMY  , HUI PAK-MING  ,   (1)香港中文大学物理系，香港新界; (2)中国科学技术大学近代物理系及非线性科学中心，合肥  230026
Published: November 2020

The cellular automaton models for one-dimensional traffic flow problems are considered.Starting with a microscopic relation for the updating rule describing the occupancy on each site of the road,a macroscopic evolution relation for the average speed of cars can be obtained by carrying out statistical averages.Mean field equations are obtained by considering the asymptotic form of the evolution relation.This gives the average car speed in the long time limit as a function of the car density.The evolution relation is a nonlinear mapping between the average speeds at two consecutive time steps.The mean field results can be obtained by studying the attractors of the mapping.The approach is applied to the study of the model recently proposed by Fukui and Ishibashi.Our calculations show that for models in which the maximum speed of each car is M,a decoupling scheme retaining correlations up to M+1 sites can be applied to the calculation of spatial correlations involving more than M+1 sites. Exact results are obtained using our approach for models without random delay.For models with random delay,results are in good agreement with the simulation results.
Si+ ION IMPLANTATION INFLUENCE ON PHOTOLUMINESCENCE IN Si1-xGex/Si QUANTUM WELLS GROWN BY MOLECULAR BEAM EPITAXY
Authors: YANG YU  , XIA GUAN-QUN  , ZHAO GUO-QING  , WANG XUN  ,   (1)复旦大学物理二系，上海  200433; (2)复旦大学应用表面物理国家重点实验室，上海  200433; (3)中国科学院上海冶金研究所，上海  200050
Published: November 2020

Ion implantation and annealing have been used to switch the luminescence in Si1-xGex/Si quantum wells from a band-edge exciton process to a broad well below the band edge. The damage introduced by silicon ion implants, which leads to the formation of the platelets correlated with broad band luminescence, is related to the track of an implanted ion and the recoiled atoms in the quantum well structures. The activation energy for defect clusters is about 0.1eV, which is larger compared with the activation energy of ～0.05 eV for interstitial atoms. This indicates that the defect clusters is responsible for the deep broad photoluminescence in early MBE samples.
MAGNETOOPTIC EFFECTS AND PROPERTIES OF MAGNETOSTATIC WAVE PROPAGATION IN YIG-GGG WAVEGUIDE UNDER INCLINED BIAS MAGNETIC FIELD
Authors: LIU GONG-QIANG  , CHEN S.TSAI  ,   (1)Department of Electrical and Computer Engineering,Institute for Surface and Interface Science,University of California,Irvine,92697 U.S.A.; (2)上海交通大学应用物理系，上海  200030
Published: November 2020

It is shown by calculation that,in contrast to the usual situation of a perpendicular bias magnetic field,an inclined bias magnetic field enhances Faraday effect,and leads to modification to the properties such as the resonant frequency and the bandwidth of magnetostatic wave in magnetic waveguide.Making appropriate use of such properties,it is possible to greatly increase the magnetooptic (MO) Bragg diffraction efficiency and to improve the characteristics of guided-wave MO Bragg devices.
THE GENERAL SOLUTION FOR THE PROBLEM OF A PLANE ELECTROMAGNETIC WAVE REFLECTED AND TRANSMITTED FROM THE INTERFACE BETWEEN A STATIONARY DIELECTRIC MEDIUM AND A DIELECTRIC MEDIUM MOVING IN AN ARBITRARY DIRECTION
Authors: HE QI-CAI  , HUANG YAO-XIONG  ,   (1)暨南大学生物医学工程研究所,广州　510632; (2)中山医科大学物理教研室，广州　510089
Published: November 2020

The problem of reflection and transmission of an electromagnetic plane wave incident from a dielectric medium, reflected and transmitted by another dielectric medium which moving in an arbitrary direction is analyzed in detail. The field vectors of the reflected and transmitted waves, and the reflection and transmission coefficients as well as the energy relations are deduced for the reflected, transmitted and incident waves. In particular, the properties of the force exerted on the moving medium by a plane wave are discussed in comparison with the case in which the incident space is free space and some new phenomenon are suggested for notice.
INTERACTION BETWEEN PARTICLE AND TEMPERATURE FIELDS OF AC PLASMA ARC
Authors: GU YU-PENG  , GONG YE  , SUN JI-ZHONG  ,   大连理工大学三束材料改性国家重点实验室，大连　116023
Published: November 2020

The interaction between particle and temperature fields of AC plasma arc is studied. Attention is given to the interaction and its effects on temperature fields and particle's thermal history. The effect of convection is also discussed. It is demonstrated that such interaction is improtant and the particle can increase the stability of arc column and the convection decrease it.
A STUDY ON THE STRUCTURE OF THE CRYSTAL LiNbO3:MgO
Authors: WANG JIN  , YANG KUN  , JIN CHAN  ,   (1)哈尔滨工业大学应用化学系，哈尔滨　150001; (2)哈尔滨工业大学应用物理系,哈尔滨  150001
Published: November 2020

We have investigated the structure of the crystal LiNbO3: MgO at both low temperature and room temperature. The results showed that the crystal structure had changed little after doping of Mg2+. At room temperature the lattice showed distorted a little, which caused the appearance of overlaping of some individual scattering peaks. As the temperature decreased, the overlaping reduced gradually.
DYNAMIC INTERACTING FORCE AND EVOLUTION OF COULOMB EXPLOSION PATTERNS FOR SWIFT H+2 PENETRATING THROUGH SOLIDS
Authors: WANG YOU-NIAN  ,   大连理工大学物理系三束材料改性国家重点实验室，大连 116023
Published: November 2020

We simulate the Coulomb explosion patterns for swift H+2 ions penetrating through solids by solving the equations of motion. The forces acting on individual fragments are given by the stopping force and the dynamic interacting force. With the plasmon-pole approximation dielectric function, the linear-response dielectric theory is used to determine the dynamic interacting force. The initial directions of the molecular axis with respect to the beam direction are assumed to be random. It is found that due to the dynamic-interaction effects, the molecular axes tend to align to the beam direction and the energy losses of the trailing ions are larger than that of the leading ions.
EXCITON STATES AND LUMINESCENT PROPERTIES IN ONE-DIMENSIONAL SEMICONDUCTOR POLYMER AND THE EFFECT OF LATTICE DISTORTION
Authors: XIONG YE  ,   南京大学物理系、固体微结构国家重点实验室,南京 210093
Published: November 2020

We use Lanczos exact diagonalization method to analyze the energy and the wave functions of exciton states in one-dimensional semiconductor polymer with electron-electron interactions. On the basis of this we further calculate the effect of the local lattice distortion on the exciton states and luminescent properties and find that the efficiency of luminescence is proportional to the strength of local lattice distortion under special electron-electron interaction parameters.
NONEQUILIBRIUM MICROWAVE RESPONSE AND KOSTERLITZ-THOULESS TRANSITION IN YBCO GRANULAR FILMS
Authors: XU KE-XI  , YU LI-MING  , A.A.ESSA  , ZHOU SHI-PING  , BAO JIA-SHAN  ,   上海大学物理系，上海  201800
Published: November 2020

The characteristic of microwave radiation (λ＝8mm) response of YBCO granular films was reported. Experimental results show that the response behavior can be described with nonequilibrium response effect, instead of thermal effect model. Near below the transition temperature T∞, nonequilibrium microwave response signal decays gradually and disappears with the sample resistance becoming zero. It was also found that the response signal is very sensitive to a weak magnetic field. The sample I-V curve was studied carefully, and the Kosterlitz-Thouless transition model can be used to describe the two-dimensional transport characteristic of the YBCO granular films. Based on the analysis and experimental results, we believe that the mechanism of nonequilibrium microwave response may be related with the breaking of the votex-antivotex pair in high Tc superconductor.
SPIN DENSITY WAVE OF ORGANIC FERROMAGNETS WITH OPEN ENDS
Authors: ZHAO JUN-QING  , WEI JIAN-HUA  , WANG SHOU-GUO  , XIE SHI-JIE  , MEI LIANG-MO  ,   山东大学物理系，济南 250100
Published: November 2020

Spin density wave in organic ferromagnets with open ends was studied and the results were compared with that in a closed organic ferromagnet ring. It was found that an end-open chain structure is unfavorable for the formation of the ferromagnetic ground. The competition of electron-electron interactions and the π-electron-radical spin couplings and their different effect on the SDW in the main chain were discussed.
MODIFICATION STUDIES ON CAOTING Sr-FERRITE NANOPARTICLES
Authors: FANG QING-QING  , ZHONG WEI  , DU YU-WEI  ,   (1)安徽大学物理系，合肥 230039；南京大学物理系，固体微结构国家实验室，南京 210093; (2)南京大学物理系，固体微结构国家实验室，南京 210093
Published: November 2020

Using XRD and TEM techniques, the modification mechanism of Fe3O4-SrFe12O19 particles has been studied. We have also studied the growth mechanism of spinel phase coating overlayer, and demonstrated that there exists a strong exchange coupling between coating overleyer and core particles due to the complexation of Fe2+ ions in suspension and Fe3+ ions extracted from the core particles. After modification, crystal structure and magnetic properties of SiFe12O19 particles were modified.
IMPULSIVE SYNCHRONIZATION OF R?SSLER SYSTEM
Authors: LIU FENG  , MU ZHAO-LI  , QIU ZU-LIAN  ,   西安交通大学自动控制工程系,西安 710049
Published: November 2020

A theoretical result of impulse synchronization of R?ssler systems is given. Based on the theory of impulse differential equation, a linear impulsive feedback synchronization rule is proposed according to synchronization errors. The condition of synchronization asymptotic stability of the rule is described and an example is given to demonstrate the effectiveness and robustness to noise in the use of the method.
CHARGE STRIPPING CROSS SECTIONS FOR 36Krq+ COLLISION WITH H AND He
Authors: LIU ZHI-JING  ,   中国科学技术大学天文与应用物理系,合肥 230026
Published: November 2020

In the text we have calculated the potential function, electron momentum distrbutions and charge stripping cross sections for 36Krq+ collision with H and He using binary encounter approximation and Thomas-Fermi approximation methods.
APPLICATION OF WAVELET ANALYSIS TO OPTICAL INFORMATION PROCESSING
Authors: MA JING  , TAN LI-YING  , RAN QI-WEN  ,   (1)哈尔滨工业大学可调谐激光技术国家重点实验室,哈尔滨 150001; (2)哈尔滨工业大学数学系,哈尔滨 150001
Published: November 2020

In this paper, the Huygens-Fresnel principle is restudied by means of wavelet analysis firstly, this builds the basis of the theory for wavelet optics. Then the theory of wavelet analysis is used to analyze the filtering in spatial domain and spatial frequency domain. For example, it gives the space variable processing for the filtering with wavelet in spatial domain, the match filtering for the filtering with wavelet in spatial fequency domain and a single slit and a round aperture for the wave-front filtering. The feasibility for treating the problems in optical field with wavelet transform is discussed, and the theoretical frame of wavelet optics is built.
PHASE COUPLING OF RF-EXCITED OPTICAL PHASE-SHIFTED ARRAY RESONATOR SLAB WAVEGUIDE CO2 LASERS
Authors: TANG XIAO-JUN  , ZHAO ZONG-HAI  , XIN JIAN-GUO  ,   (1)北京理工大学信息工程学院光电工程系,北京 100081; (2)船舶工业总公司船舶系统工程部,北京 100036
Published: November 2020

In this paper, an optical array resonator with phase-shifting end mirror has been combined with the RF-excited diffusively cooled slab waveguide CO2 lasers to obtain a desirable output laser beam with single-peaked far-field intensity distribution, which is highly spatially suppressed with the merits of high brightness and good characteristics of propagation. In the experiments, a maximum output power of 46 W and highest conversion efficiency of 11.3% have been obtained from a 200-mm-gain-length device. The laser beam intensity distribution acquired has similar characteristics to the ouptut beam from laser arrays due to the periodical structure of the phase-shifting total reflector, and has an excellent stability due to the mode-selection capability of this type of resonator. In this paper, theoretical analysis is also given, based on which corresponding theoretical model is established, the practical feasibility is shown, and the laser beam output with characteristics of in-phase array mode is predicted. The systematical experimental investigation indicates the prominent influence of the parameters of the phase-shifting array end mirror on the property of the output beam. Furthermore, the manufacturing errors of the phase-shifted array resonator are analyzed and the analysis provides a theoretical guide to the design of this type of lasers.
CALCULATIONS OF THE FORMATION ENERGIES OF POINT DEFECTS IN ALKALINE EARTH FLUORIDES
Authors: JIN QING-HUA  , FENG SHAO-SIN  , GUO ZHEN-YA  , LI BAO-HUI  , DING DA-TONG  ,   南开大学物理系，天津 300071
Published: November 2020

The formation energies of point defects in CaF2, SrF2 and BaF2 were calculated in terms of the shell model parameters and potential parameters of the interaction between the ions in these alkaline earth fluoridds, which had been determined by empirical parameterization. Moreover, the calculated phonon dispersion relations for SrF2 and BaF2 were compared with the data of inelastic neutron scattering a retest for the quality of these parameters.
DEPOSITION OF CNx THIN FILMS BY ELECTROLYSIS OF ORGANIC SOLUTION
Authors: XU QI-AN  , SHEN MING-RONG  , NING ZHAO-YUAN  , ZHU JING-SHENG  ,   (1)苏州大学物理系,杭州 215006; (2)中国科学技术大学结构分析开放研究实验室,合肥 230026
Published: November 2020

By electrolysis of the methanol and urea solutions CNx thin films have been synthesized on silicon substrates at atmospheric pressure and low tempreture (60℃). The FTIR and Raman measurements show that the films are amorphous carbon network with the staples of many C—N, C—C, C＝C and C＝N bonds and a small portion of C≡N bonds. The XPS measurements indicate that nitrogen atoms is chemically bonded to carbon atoms through hybridized SP2 and SP3 configurations. The structures of the amorphous CNx thin films deposited by this method are every similar to those by vapor depositions.
A RADOM MODEL OF THIN FILM GROWTH
Authors: LIU ZU-LI  , WEI HE-LIN  , WANG HAN-WEN  , WANG JUN-ZHEN  ,   华中理工大学物理系,武汉 430074
Published: November 2020

The relationship between temperature of substrate and island morphology at the early phase of thin film growth has been investigated using Monte Carlo model. The relationship between island morphology and rest energy of vapor phase particles has also been obtained. Three kinds of dynamic processes, i.e.adsorption, diffusion and desorption are considered. The difference between our model and the previous one is that the impingement is considered to be independent of other processes, and the diffusion and desorption are correlated with each other. The results indicate that with increasing temperature, the island morphology evolves from dispersed growth, fractal growth to dense growth. At low temperatures, with increasing energy of vapor phase particles, the same evolution of island morphology is also observed.
PROPERTIES OF a-SiCxNy∶H FILMS PRODUCED BY REACTIVE-SPUTTERING
Authors: WU XIAN-CHENG  , WANG YIN-YUE  ,   兰州大学物理系，兰州  730001
Published: November 2020

Amorphous hydrogenated silicon, carbon nitride thin films (a-SiCxNy∶H) are deposited at room temperature by r.f. reactive-sputtering method. Thin film structure and optical, electrical properties are measured and analyzed using IR spectra, optical absorption spectra ［α(λ)］, electron spin resonance (ESR) and electrical conductivity (σ). The dark conductivity σd，optical gap Eopt, ESR spin density Ns　as functions of N2 flow γN2 are studied with the H2 flow γH2=12% and N flow γN2 varying between 0—14%. The results show that the thin film structure and properties are obviously modified owing to the co-existence of carbon and nitrogen and suddenly changed when γN2 is about 5%.
RELATIVISTIC FOUR-COVARIANT EQUATION OF VARIABLE-MASS BODY
Authors: FANG JIAN-HUI  ,   石油大学华东应用物理系,东营 257062
Published: November 2020

In this paper, simultaneously considering the variation of classical mass and the relativistic effect of mass variation with velocity, a relativistic four-covariant equation of variable mass body is built. And the physical meaning of this equation is demonstrated. Ackeret formula is derived from the equation.
FACTORIZATION OF GELFAND-DICKEY OPERATOR, B?CKLUND-DARBOUX TRANSFORMATION AND SYMMETRY
Authors: WANG NING  ,   青岛海洋大学技术科学学院,青岛 266003
Published: November 2020

Explicit expressions of n B?cklund-Darboux (BD) transformations and corresponding symmetries for generalized KdV (GKdV) equation, were constructed by using factorization of Gelfand-Dickey operator. This extends Lou's recent result about the BD transformations and non-local symmetries for KdV, Kadomtsev-Petviashvilli equations. As a by-product, we also derive a representation of Wronskian determinant for the GKdV solution.
PREPARATION OF PSEUDO-PURE STATES FOR NMR QUANTUM COMPUTATION
Authors: FANG XI-MING  , ZHU XI-WEN  , MENG MANG  , GAO KE-LIN  , SHI LEI  ,   中国科学院武汉物理与数学研究所波谱与原子分子物理国家重点实验室,武汉 430071
Published: November 2020

After analyzing the course of forming‘garbage blocks’, we proposed an alternative for preparing the pseudo-pure states. It can be used to reduce or even to remove the‘garbage blocks’.
THEORETICAL STUDY OF THE LOW-LYING PROLATE BANDS IN THE NUCLEI 186,188,190Pb
Authors: SHEN SHUI-FA  , CHEN XUE-SHI  , WANG ZI-XING  , SHI SHUANG-HUI  , GU JIA-HUI  , LIU JING-YI  ,   中国科学院上海原子核研究所,上海　201800
Published: November 2020

The projected shell model is applied to the nuclei 186Pb, 188Pb and 190Pb. The low-lying prolate bands of them are calculated and the results are compared with experimental data, the low-lying bandheads of these three nuclei are predicted, the reliability of this prediction is validated when we apply this model to the nucleus 186Hg and it gives a satisfactory agreement with the experimental data.
CHARGE TRANSFER FOR PROTON AND α PARTICLE COLLIDING WITH HELIUM ATOM AT INTERMEDIATE ENERGIES
Authors: ZHOU XIAO-XIN  , LI BAI-WEN  ,   (1)中国科学院武汉物理与数学研究所波谱与原子分子物理国家重点实验室,武汉 430071; (2)中国科学院武汉物理与数学研究所波谱与原子分子物理国家重点实验室,武汉 430071；西北师范大学物理系,兰州 730070
Published: November 2020

Charge transfer processes for double-electron colliding systems H++He and He2++He have been studied by using the asymptotic two-state atomic expansion method developed recently. Our results for the cross sections of electron capture are in good agreement with those given by the boundary-corrected first-order Born (B1B) approximation and experimental data in high-intermediate energies, and in the low-intermediate energies the present results are better than those obtained by the B1B approximation. Finally, we point out that the reason that capture cross sections predicted by first-order perturbation theory are in poor agreement with experimental data.
STATISTICAL PROPERTIES OF SUPERPOSITION OF ODD AND EVEN SU(1,1) COHERENT STATES
Authors: LU HONG  , GUO GUANG-CAN  ,   (1)广东佛山科学技术学院应用物理与通信工程系,佛山 528000；中国科学技术大学物理系和非线性科学中心,合肥 230026; (2)中国科学技术大学物理系和非线性科学中心,合肥 230026
Published: November 2020

We study the statistical properties in the superpositions of SU(1,1) coherent states ｜ζ，k〉and ｜ζ，k〉. The even SU(1,1) coherent state (｜ζ，1/4〉) and odd SU(1,1) coherent state (｜ζ，3/4〉) correspond to squeezed vacuum state and squeezed one photon number state, respectively. It is shown that the superposed states can exhibit much stronger squeezing and antibunching for the suitable phase of ζ and the relative phase in superposition. We also propose a method of generating such superposed states.
PHOTON ANTIBUNCHING IN THE TWO-PHOTON JAYNES-CUMMINGS MODEL WITH A NONLINEAR CORRECTION TERM
Authors: TIAN YONG-HONG  , PENG JIN-SHENG  , XU DA-HAI  , TAO SHAO-HUA  ,   (1)湖北荆州师范学院物理系,荆州 434100; (2)华中师范大学物理系,武汉 430079; (3)华中师范大学物理系,武汉 430079；湖北荆州师范学院物理系，荆州 434100
Published: November 2020

The effects of photon antibunching in the interaction system of a two-level Rydberg atom with a single-mode thermal field via two-photon processes are studied, by considering the second-order correction of atomic scattering. The influences of the nonlinear correction term, the two photon frequency detuning and the thermal noise on the photon antibunching are discussed.
A COMPARISON STUDY ON THE PROPAGATION CHARACTERISTICS OF FLATTENED GAUSSIAN BEAMS AND SUPER-GAUSSIAN BEAMS
Authors: LUO SHI-RONG  , LV BAI-DA  , ZHANG BIN  ,   四川大学激光物理与化学研究所,成都 610064
Published: November 2020

The propagation characteristics of flattened Gaussian beams (FGBs) and super-Gaussian beams (SGBs) have been studied and compared with each other. Numerical illustrative examples have been given. The main result obtained in this paper is that the FGB and SGB with the same M2 factor and beam width demonstrate the very similar propagation and transformation characteristics, including the intensity distribution and diffraction effect due to the aperture, while they propagate through an optical system.
MECHANISM OF ELECTROLUMINESCENCE FROM a-Si:H AND STUDIES OF DEFECT ENERGY DISTRIBUTION IN INTRINSIC LAYER OF a-Si:H SOLAR CELLS BY ELECTROLUMINESCENCE SPECTRA
Authors: HAN DA-XING  , WANG WAN-LU  , ZHANG ZHI  ,   (1)美国北卡罗莱那大学物理天文系,NC27599-3255,USA; (2)重庆大学应用物理系,重庆 400044
Published: November 2020

The features of the electroluminescence spectra in amorphous silicon p-i-n diodes were ecxellently explained by dispersive-transport-controlled recombination. The misunderstanding to the efficiency and peak position of the electroluminescence for many yera was thereby clarified by the theory. The experimental methods of local states in the intrinsic layer of a-Si-H solar cells studied by the electro-luminescence were described in detail. The studied results showed that the defect energy distribution exhibited a single narrow peak when the samples were prepared by diluted silane using hydrogen, while the defect energy distribution was wider with double peaks in the samples deposited by pure silane.
RELATION BETWEEN IRREVERSIBILITY LINE AND VORTEX-GLASS LINE IN EPITAXIAL YBa2Cu3O7-δ THIN FILMS
Authors: WANG ZHI-HE  , CAO XIAO-WEN  , FANG JUN  , CHEN ZHI-YOU  , LI KE-BIN  ,   (1)中国科学院等离子体物理研究所，合肥  230031; (2)中国科学院固体物理研究所，合肥  230031; (3)中国科学院上海冶金研究所，上海  200050
Published: November 2020

We have measured in detail the resistive transition and the isothermal current-voltage curves in the case of applied magnetic field parallel and perpendicular to the surface of the film up to 10T for an epitaxial YBa2Cu3O7-δ thin film, respectively. The comparative study of the irreversibility line from the R-T curves with the vortex-glass line from the I-V curves was made. The results showed that the irreversibility line determined from the different reduced resistivity criterion and vortex-glass line follow the same power law, H∝(T(0)-T(H))n, and n=4/3 for the vortex-glass line, n=3/2 for the irreversibility line. The irreversibility line is dependent not only on the different reduced resistivity criterion but also on the measuring current density. The vortex-glass line lies below the irreversibility line. The possible origin of the difference between such two lines was discussed.
NERNST THEOREM AND PLANCK ABSOLUTE ENTROPY OF BLACK HOLE
Authors: ZHAO ZHENG  , ZHU JIAN-YANG  ,   (1)北京师范大学物理系，北京 100875; (2)江西师范大学物理系，南昌 330027；北京师范大学物理系，北京　100875
Published: November 2020

After considering thermal character of the inner horizon of Kerr black hole, we give a new form of the Bekenstein-Smarr formula and re-define black hole entropy. The balck hole entropy re-defined must go to zero as the temperature of black the approaches absolute zero. The entropy satisfies the Nernst theorem, so it can be regarded as the Planck absolute entropy of black hole.
CONSTRUCTION AND CALCULATION OF COUPLED WAVE FUNCTIONS AND MATRIX ELEMENTS OF OPERATORS FOR EQUIVALENT ELECTRONS
Authors: LI XIAO-MEI  , CHEN  JIAN-HUA  ,   总装备部指挥技术学院电子技术系，北京  101416
Published: November 2020

The coupled wave functions for equivalent electrons are constructed by (U,D)L-LSQ-R scheme,where U(D) is the total orbital angular momentum of all spin up (down) electrons,Q is the quasi-spin,R is the interchange operator between spin and quasi-spin.It is
A NONLINEAR STATE FEEDBACK APPROACH TO THE CONTROL AND SYNCHRONIZATION OF CONTINUOUS-TIME CHAOTIC SYSTEMS
Authors: GAO JIN-FENG  , LUO XIAN-JUE  , MA XI-KUI  , PAN XIU-QIN  , WANG JUN-KUN  ,   (1)西安交通大学电气工程学院，西安  710049; (2)郑州工业大学电气信息工程学院，郑州  450002
Published: November 2020

This paper presents a nonlinear state feedback approach to the control and synchronization of chaotic nonlinear dynamic systems based on a unified frame for both the control and the synchronization.Assuming the boundedness of chaotic attractors and limit
LASER-ASSISTED ELECTRON-ATOM COLLISIONS:THE KROLL-WATSON FORMULA AND THE SECOND BORN APPROXIMATION
Authors: SUN JIN-FENG  , MA ER-JUN  , JIANG YU-HAI  , ZHANG SHENG-HAI  ,   河南师范大学物理系，新乡  453002
Published: November 2020

Recent measurements on CO2-laser-assisted electron-atom collisions have shown large inconsistencies with the Kroll-Watson formula.We use Born approximation theory to carry out a detailed study of the problem.The calculations have shown that the
HARD MAGNETIC PROPERTIES OF Sm-Fe-Cu-Si-C WITH THE 2∶17-TYPE STRUCTURE
Authors: ZHANG HONG-WEI  , ZHANG SHAO-YING  , SHEN BAO-GEN  ,   中国科学院物理研究所磁学国家重点实验室和凝聚态物理中心，北京  100080
Published: November 2020

The structural and magnetic properties of Sm2Fe15Si2C and Sm2Fe14CuSi2C were analyzed.The Curie temperature TC and saturation magnetization Ms were measured.The magnetocrystalline anisotropy field HA and anisotropy constant K1 and K2 at temperatures ranging from 1.5K to room temperature were obtained by analyzing the magnetic curve.We can conclude that Cu does not come into the Th2Zn17-type structure,while Cu doping modifies the micro-structure and enhances the coercivity of Sm2Fe14CuSi2C ribbons.The maximum intrinsic coercivity(μ0iHc)around 1.0 and 1.2 T at room temperature for Sm2Fe15Si2C and Sm2Fe14CuSi2C ribbons were achieved, respectively. The microstructural parameter αk and the averaged local effective demagnetization factor Neff were derived from the temperature dependence of coercivity.
THEORETICAL ANALYSIS OF PHOTOREFRACTIVE MULTIPLE-QUANTUM-WELL OPTICALLY ADDRESSED SPATIAL LIGHT MODULATORS
Authors: LI YI-GANG  , GUO RU  , JIN PENG  , PAN SHI-HONG  ,   南开大学物理系，天津  300071
Published: November 2020

Using transient two-dimensional transport model, theoretical analysis is developed for optically addressed spatial light modulators with semi-insulating multiple-quantum-well structure operating in longitudinal field geometry. A partial differential equat
STUDY ON MICROSTRUCTURAL CHARACTERIZATION AND FERROMAGNETIC RESONANCE IN SPUTTERED Co/V MULTILAYERS
Authors: WU JING  , DU JUN  , LU MU  , ZHAO XIAO-NING  , XU HUI-PING  , ZHAI HONG-RU  , ZHANG SHU-YUAN  , ZHANG YU-HENG  , XIA HUI  ,   (1)南京大学物理系，现代分析中心，固体微结构物理国家重点实验室，南京  210093; (2)冶金工业部有色金属研究总院，北京  100088; (3)中国科学技术大学结构分析中心，合肥  230026
Published: November 2020

The structure and magnetic properties of a series of rf sputtered ［Co(1.5nm)/V(dV)］20(0.5nm≤dV≤4nm)multilayers have been studied.The multilayers structure is found by X-ray diffraction,cross-section transmission electron microscopy,and high-resolution transmission electron microscopy to be polycrystalline with small individual columnar grains and has fairly strong fcc Co(111)and bcc V(110) texture in the film growth direction.The structural characterizations also show composition-modulated structure and severely alloyed effect.Ferromagnetic resonance measurements show relatively small g factors and 4π Meff values,which also indicates that multilayers are severely alloyed.Complicated spin wave resonance spectra were observed and analyzed.The evaluated small interlayer coupling constant shows the effect of weak exchange coupling between Co layers across V spacers.