bluuebunny/crossref_metadata_2025_split huggingface dataset:
Magnetic and magnetocaloric properties of Gd melt-spun ribbons
Authors: Svalov A , Andreev S , Arkhipov A , Kudyukov E , Neznakhin D , Larrañaga A , Kurlyandskaya G 
Published: November 2019

Abstract
Structural features, magnetic properties and magnetocaloric effect of pure Gd ribbons prepared by melt spinning method were carefully analyzed. The X-ray data show that there is no change in the cell parameters for the samples prepared at different copper-wheel speed. Average size of nanocrystalline grains was close to 30 nm. As compared to the bulk Gd sample, the Curie temperature was the same in the case of the ribbons. From the magnetic isotherms, the magnetic entropy change was derived using the Maxwell relation follow the standard procedure. Its value was comparable with the value of the bulk Gd. Good mechanical properties of fabricated Gd ribbon and their flexibility can be useful for design of flexible refrigerating elements.
Magnetocaloric effect in TbCo-based multilayers
Authors: Svalov A , Makarochkin I , Kudyukov E , Stepanova E , Vas’kovskiy V , Larrañaga A , Kurlyandskaya G 
Published: November 2019

Abstract
TbCo-based magnetic multilayers with different thicknesses of Tb-Co layers and non-magnetic spacers (Ti, Si) have been prepared by sputtering. The structure and magnetocaloric properties of these samples have been investigated. The peak value of magnetic entropy change in TbCo-based multilayers is smaller than the one previously reported for bulk counterparts. Nanostructuring leads to a table-like temperature dependence of the magnetic entropy change. It has been shown that the material of non-magnetic spacers can have a noticeable effect on magnetocaloric properties of TbCo-based magnetic multilayers.
Susceptibility and FMR in ferrite garnet epitaxial films for eddy current magneto-optical defectoscopy
Authors: Lugovskoy Nazar , Berzhansky Vladimir , Semuk Evgeniy , Shaposhnikov Alexandr 
Published: November 2019

AbstractThe paper presents the magnetic properties of easy plane and easy axis films on the base of Bi - ferrite garnet experimentally investigated by ferromagnetic resonance and the inductive-frequency method. The possibilities and features of the operation of these films as sensors in eddy current magneto-optical introscopy are shown on the example of visualization of linear defects in products made from aluminium alloys.
Nonlinear magneto-optical Kerr effect in Co/Pt and Co/Ta bilayer films
Authors: Kolmychek Irina A , Lazareva Kseniya A , Radovskaya Victoria V , Maydykovskiy Anton I , Temiryazeva Marina P , Temiryazev Alexey G , Shalygina Elena E , Sadovnikov Alexandr V , Nikitov Sergey A , Karashtin Evgeny A , Gusev Nikita S , Fraerman Andrey A , Murzina Tatiana V 
Published: November 2019

Abstract
Nonlinear magneto-optical Kerr is used to study the magnetic properties of thin bilayer films composed of cobalt and two different non-magnetic metals, platinum and tantal. Our experiments reveal different nonlinear-optical response of these two types of structures related to specific magnetic properties of Co/Ta and Co/Pt interfaces.
Magnetooptical properties of epitaxial strained ferrite films grown by MOCVD method
Authors: Telegin A V , Lobov I D , Korsakov I E , Bessonova V A , Sukhorukov Yu P 
Published: November 2019

Abstract
CoFe2O4 (111) epitaxial films on a single crystalline (100) ZrO2(Y2O3) substrates and non-oriented CoFe2O4 films on a metal tape were grown by the metalloorganic chemical vapour deposition (MOCVD) method. The CoFe2O4/ZrO2(Y2O3) films contain the coherent high-angle boundaries between variant domains due to the complex epitaxial distortions compared to polycrystalline state of the CoFe2O4/(metal tape) film. The structural peculiarities of films with variant structure lead to the strong anisotropy of its magnetooptical properties. Moreover a significant magnetorefractive effect, up to 1 % at 6 kOe, is revealed in both the polycrystalline and epitaxial films with variant structure in the near infrared spectral range.
Peculiarities of magneto-infrared reflectivity of nanostructured manganite films
Authors: Bessonova V , Telegin A , Nosov A , Sukhorukov Yu , Ganshina E 
Published: November 2019

Abstract
The electrical resistance and reflectance of unpolarized infrared radiation have been studied in the La2/3Ba1/3MnO3 films with and without a variant structure. Applying of an external magnetic field leads to appearance of magnetoreflection and colossal magnetoresistance effects with maxima near the Curie temperature of the films. The high-angle boundaries markedly enhance the electric and magnetooptical properties of nanostructured epitaxial films with the variant structure. For example, an additional low-temperature contribution to the magnetoreflection has been revealed in La2/3Ba1/3MnO3/ZrO2(Y2O3) films. This peculiarity is associated with the change of the high-frequency conductivity of the films with the variant structure due to the processes of tunnelling of spin-polarized electrons across the boundaries of structural domains far below the Curie temperature of the sample. The detection of “tunnel magnetoreflection” in the doped lanthanum manganite films could promote extension of the scope of their application in the modern optoelectronics.
Amorphous Finemet films for visualization of inhomogeneous magnetic fields
Authors: Ivanov V E , Lepalovskij V N 
Published: November 2019

Abstract
This paper shows that amorphous Finemet films can be used as a medium for visualization and topography of inhomogeneous magnetic fields. The intensity of magnetooptical images obtained in the geometry of the polar magneto-optical Kerr effect is proportional to the normal component of the inhomogeneous magnetic field. This allows us to construct two-dimensional topograms of the normal component of the magnetic field. The images observed in the geometry of the longitudinal magneto-optical Kerr effect carry information about the planar component of the field. The vector field of the plane component has singular points that are displayed by magneto-optical images. Applying an external homogeneous field leads to the appearance of new singular points and their motion. At special points, the plane component of the field is equal to the value of the external field. This allows you to display a planar component by recording the coordinates of specific points.
Magnetic microstructure of the Finemet-type thin films
Authors: Mikhalitsyna E , Soboleva E , Kataev V , Kulesh N , Lähderanta E 
Published: November 2019

Abstract
Fe73.9Cu1Nb3Si13.2B8.9 thin films were deposited on the glass substrates by means of ion-plasma radio frequency sputtering. Heat treatment at temperatures of 350, 400 and 450 °C was performed for 30 minutes in order to control thin film structural state. The X-ray powder diffraction showed that the crystallization of α-Fe(Si) nanograins took place at the temperature of 420 °C whilst the other samples stayed in the amorphous state. The magnetic microstructure of the Fe73.9Cu1Nb3Si13.2B8.9 films was discussed in the framework of random anisotropy model and law of approach of magnetization to saturation. The parameters of magnetic microstructure were determined, and relations between structure and macroscopic magnetic properties were interpreted by means of magnetic microstructure analysis.
Investigation of magnetization reversal processes in Sm(Co, Fe, Cu, Zr)7.5 magnets
Authors: Urzhumtsev A N , Andreev S V , Sharin M K , Moskalev V N , Volegov A S 
Published: November 2019

Abstract
The processes of magnetization reversal in isotropic and anisotropic commercial permanent magnets Sm(Co, Fe, Cu, Zr)7.5 were investigated. Features of magnetization reversal process in both textured and isotropic magnets were analyzed with δM(H) plots, magnetic susceptibility and initial magnetization curves. The magnetization reversal of Sm(Co, Fe, Cu, Zr)7.5 magnets is more complicated than that described in the coercivity model based on the domain walls pinning.
Structure and magnetic properties of (Sm1-xZrx)Fe11Ti (x=0-0.2) alloys
Authors: Ryzhikhin I , Andreev S , Semkin M , Selezneva N , Volegov A , Kudrevatykh N 
Published: November 2019

Abstract
Compounds with a tetragonal structure of the ThMn12 type have a high potential for creating on their basis permanent magnets with high energy density and operating temperatures up to 150 – 200 °C. In this work, samples of alloys (Sm1-x
Zr
x
)Fe11Ti (x = 0 – 0.2) obtained by the rapidly quenching method with subsequent annealing were investigated. Depending on the chemical composition and modes of synthesis in alloys (Sm1-x
Zr
x
)Fe11Ti (x = 0 – 0.2) phases of the ThMn12, α-Fe type and a small amount of ZrFe2 are formed, as well as phases with the Th2Zn17 structural type and TbCu7 at high annealing temperatures. The best magnetic properties at room temperature are realized in the alloy (Sm0.9Zr0.1)Fe11Ti after annealing at a temperature of 800 °C.
Magnetizing of Finemet-type alloys by magnetization rotation in weak fields
Authors: Kataev V A , Starodubtsev Y N , Bessonova K O 
Published: November 2019

Abstract
Magnetic properties of functional magnetic materials depend on the magnetization processes nature. Creation of amorphous and nanocrystalline alloys using the rapid quenching technology is the result of the latest advances in magnetic materials area. Although significantly different in structure, they show excellence properties. In this paper we will investigate the magnetization properties of the Finemet-type nanocrystalline alloys in the range of their initial permeability formation. We will show that due to low level of effective magnetic anisotropy, even in weak fields, magnetization can occur through reversible, hysteresis-free rotation of the domain’s magnetization vector.
Effect of intergrain exchange interaction on magnetic viscosity of nanocrystalline isotropic NdFeB magnets
Authors: Volegova E A , Andreev S V , Selezneva N V , Urzhumtsev A N , Volegov A S 
Published: November 2019

Abstract
The coefficient of magnetic viscosity, S, of NdFeB alloys with varied intergrain exchange interaction constant, K
IEI, was measured. The observed dependences of fluctuation field, H
f, on the applied field, H, are strongly correlated with K
IEI value. Cooperative magnetization reversal of single domain interacting particles leads to improve the temperature stability of permanent magnets and magnetic systems based on them.
Magnetic and magnetoimpedance properties of rapidly quenched ribbons of modified alloys based on FINEMET
Authors: Stepanova E A , Volchkov S O , Lukshina V A , Khudyakova D M , Larrañaga A , Neznakhin D S 
Published: November 2019

Abstract
Amorphous and nanocrystalline materials are attractive systems for basic research and technological applications. In a view of the energy economy and global warming concepts there is a request to search for soft magnetic materials for sensor applications, which do not request additional heat treatments and can be produced in most simple technological scheme. In this work the structure, static magnetic properties and magnetoimpedance (MI) were studied for FINEMET-type materials both with classic composition and for compositions with 10 % of iron substitution by Co, Ni, or Mn in initial state, i.e. without any additional heat treatmnet. The best MI responses were obtained for Mn-doped rapidly quenched ribbons.
Effect of solid solution treatment and nitrogenation on magnetic properties of Sm2+αFe17Nx powders
Authors: Kolodkin D , Popov A , Protasov A , Gaviko V , Kavita S , Prabhu D B , Gopalan R 
Published: November 2019

Abstract
The effect of solid solution treatment (SST) of Sm-Fe alloys and conditions of the nitrogenation on the structure and magnetic properties of the Sm2+αFe17N
x
(α = 0 ÷ 0.6) powders has been investigated. It is observed that the nitrided powders with the best hysteresis properties can be prepared from the Sm2.4Fe17 alloy after the SST at a temperature of 1050°C (5 h) and heat treatment at 525°C in a H2: N2 = 1: 1 gas mixture with a pressure of 2.5 atm. The additional ball milling of the powder enhances the coercivity to 6.4 kOe.
Magnetic properties of Co-W thin films
Authors: Lepalovskij V N , Gorkovenko A N , Nikulin K E , Moskalev M E , Kulesh N A , Vas’kovskiy V O 
Published: November 2019

Abstract
In this paper, the magnetic properties and structure of the Co-W films of different compositions prepared by magnetron sputtering on glass substrates without and with Ta or Ru buffer layers were investigated. The dependences of coercive force on the W content for the studied films were non-monotonic. The peak value of the coercive force of about 400 Oe was observed for the films on glass and Ta layers with W content of 8-9 at. %. The films deposited on Ru layers had a coercive force of 4 times less, and it was practically independent of the W content in a wide range from 6 to 20 at. %.
Unusual weak increase of Curie temperature and lattice parameters in Pr2Fe16.5Zr0.5
Authors: Platonov Sergey , Kuchin Anatoly , Gaviko Vasiliy , Voronin Vladimir , Yakovleva Maria 
Published: November 2019

Abstract
Crystal structure and magnetic and thermomagnetic properties of the Pr2Fe17-x
M
x
compounds with M = Ti, V, Cr, Zr, Nb have been studied. The change of interatomic distances is not enough to explain the growth of the Curie point and it is necessary to assume the distribution of M = Ti, V, Cr, Nb atoms over the lattice positions, similar to that previously published for the Nd2Fe17-x
M
x
compounds. It was established by neutron diffraction that Zr atoms substitute for Pr atoms in the 6c site and do not substitute for Fe atoms as might be expected from the original formula Pr2Fe16.5Zr0.5. So, the real composition of the substituted compound studied is Pr14.8(8)Zr0.52(8)Fe17. The magnetic moment of Fe atom and the magnetocaloric effect in the Pr2Fe17-x
M
x
compounds decrease with decreasing Fe content.
Magnetic properties of Cu2MnBO5 ludwigite in weak magnetic fields
Authors: Moshkina E M , Eremin E V , Velikanov D A 
Published: November 2019

Abstract
The results of magnetization measurements in low and ultralow (0<|H|<10 Oe) magnetic fields are presented for single-crystal Cu2MnBO5 ludwigite. An own SQUID magnetometer and AC measurement system and vibrating sample magnetometer options of PPMS were used. Magnetic properties have been investigated at different cooling modes of the sample. The features of the magnetic moment behaviour are revealed. The dissimilarity of magnetic measurement data obtained using various types of magnetometers is observed. The reasons for this are discussed.
Properties of antiferromagnetic resonance in GdB6
Authors: Semeno A V , Gilmanov M I , Shitsevalova N Yu , Demishev S V 
Published: November 2019

Abstract
Antiferromagnetic resonance in GdB6 exhibits a series of anomalous features such as jump of the resonance position at T
N = 15.5 K and resonance evolution to four line structure with further temperature decrease. Here we report the study of temperature behaviour of antiferromagnetic resonance modes v(H
0) in AFM phase. We analyzed v(H
0) dependencies at several temperatures T < T
N within the model of an antiferromagnet with easy anisotropy axis. In the result we have demonstrated that AFMR behaviour is determined by two following factors: (i) abrupt change of the gyromagnetic ratio γ at T
N, which remains constant (corresponding to g-factor g = 1.27) in AFM phase and (ii) jump of zero field frequency v
0 (from v
0 ≈ 0 to v
0 ≈ 20 GHz at TN
with its further growth to v
0 ≈ 35 GHz at T = 1.9 K.
NMR study of magnetic nanoparticles Ni@C
Authors: Mikhalev K N , Germov A Yu , Prokopyev D A , Uimin M A , Yermakov A Ye , Konev A S , Gaviko V S , Novikov S I 
Published: November 2019

Abstract
The 61Ni, 13C NMR spectra of carbon encapsulated nickel nanoparticles have been obtained. It has been shown that the cores of the particles consist of metallic nickel with face-centered cubic structure, nickel carbide Ni3C and carbon-nickel solid solution. The carbon shell of nanoparticles is a highly defective structure and close to an amorphous glassy-like carbon.
Orbital dependence of superexchange interaction in charge-ordered manganites
Authors: Gonchar L E 
Published: November 2019

Abstract
The current investigation is devoted to the theoretical study of orbital structure influence upon magnetic subsystem in half-doped charge-ordered manganites. The main interaction of magnetic subsystem is superexchange interaction. It forms spin-wave dispersion dependencies. Because of charge and orbital ordering, there are a lot of superexchange parameters in these compounds. That makes the dispersion rather complicated. This work clarifies some features of dispersion in terms of orbitally-dependent superexchange interactions.
Spin-wave excitations in YIG films grown on corrugated substrates
Authors: Sakharov V K , Khivintsev Y V , Stognij A I , Vysotskii S L , Filimonov Y A , Beginin E N , Sadovnikov A V , Nikitov S A 
Published: November 2019

Abstract
Yttrium-iron garnet (YIG) film was deposited by ion-beam sputtering on gadolinium gallium garnet (GGG) substrate with the periodical array of grooves ion-etched in its surface. Spin-wave excitations in the fabricated structure were studied by the ferromagnetic resonance (FMR) method and by the spin-wave spectroscopy. Results were compared with ones for the YIG film deposited on GGG substrate without the periodical relief.
Micromagnetic modeling of autoresonance oscillations in yttrium-iron garnet films
Authors: Teplov V S , Bessonov V D , Batalov S V , Telegin A V 
Published: November 2019

Abstract
One of the main problems of magnonics is finding the ways of efficiently spin waves excitation in a magnet. This paper considers the method of nonlinear amplification by phase locking of amplitude of dynamic magnetization in yttrium-iron garnet film performed by micromagnetic modeling with MuMAX3 software taking into account the real materials parameters. It is shown that the excited magnetization precession can be considered as a autoresonance phenomena. The intensity of the autoresonance in ferrimagnetic yttrium-iron garnet films has threshold dependence on the chirp rate of the exciting magnetic field.
GMR effect in nonhomogeneous magnetic field
Authors: Babaitsev G V , Chechenin N G , Dzhun I O , Kozin M G , Romashkina I L 
Published: November 2019

Abstract
Magnetic field sensors, based on giant magnetoresistance (GMR) effect, have a wide range of practical implementations. One of them is the use as a positioning device in different kind of actuators. Here we report on modelling of magnetoresistivity response of spin-valve (SV) based GMR structure in a various geometry of SV positioning with respect to a magnetic reference label. The model includes the magnetic label of a certain shape producing a nonhomogeneous magnetic field in 3D space and moving along a straight line in front of SV device. Different mutual label-SV positioning is considered. The reaction of micromagnetic configuration in the ferromagnetic layers and corresponding magnetoresistive effect of the SV is calculated and analyzed.
Electrical, magnetic and galvanomagnetic properties of Mn-based Heusler alloys
Authors: Semiannikova A A , Irkhin V Yu , Terentev P B , Perevozchikova Yu A , Korenistov P S , Prekul A F , Marchenkova E B , Eisterer M , Marchenkov V V 
Published: November 2019

Abstract
Half-metallic ferromagnets and spin gapless semiconductors are promising materials for spintronic devices since a high degree of the spin polarization of charge carriers can be realized in such materials. Spin gapless semiconductors make it possible to combine the properties of half-metallic ferromagnets with semiconductor characteristics and to perform fine tuning of the energy gap value. The Mn2
MeAl (Me = Ti, V, Cr, Mn, Fe, Co, Ni) Heusler alloys can possess such features. We studied the electrical, magnetic and galvanomagnetic properties of the Mn2
MeAl (Me = Ti, V, Cr, Mn, Fe, Co, Ni) Heusler alloys from 4.2 K to 900 K and in magnetic fields up to 100 kOe. The features in the electronic and magnetic properties of Mn2MeAl Heusler alloys were observed, which can be a manifestation of the electronic energy spectrum peculiarities with occurrence of the half-metallic ferromagnet and/or spin gapless semiconductor states.
Novel method of phase determination in neutron reflectometry using reference layer
Authors: Nikova E S , Salamatov Yu A , Kravtsov E A , Ustinov V V 
Published: November 2019

Abstract
We describe a novel method for phase recovery in neutron reflectometry which is based on using Gd reference layer of known thickness. Deposition of Gd reference layer at the top of unknown nanostructure allows us to reconstruct the complex reflection coefficient from the structure and to solve phase problem for magnetic nanostructures under investigation. This method makes it possible to use direct model-independent approaches (for example, Gelfand-Levitan-Marchenko approach) to obtain the scattering potential.
Magnon caustics in face centered cubic ferromagnets
Authors: Bakharev Sergey , Borich Michael , Savchenko Sergey 
Published: November 2019

Abstract
Caustic phenomenon in magnon propagation picture in face centered cubic lattice is investigated. The employed model takes into account the Heisenberg exchange interaction between an atom’s spin and it’s nearest and next nearest neighbors. Caustic directions are defined by exploring the corresponding dispersion relations. On the basis of face centered cubic lattice of EuS ferromagnet, such singular peculiarities are investigated for different Heisenberg exchange parameters. Magnon energy regions where the caustics can be observed are defined together with the caustic directions in characteristical crystallographic planes {100} and {110}. It was obtained that caustics can be observed if the magnon frequency is about hundreds of gigahertz, and the widths of the caustic direction regions, that are determined by the magnon frequencies, are of the order of dozens of degrees.
Spin valve based sensor elements for full Wheatstone bridge
Authors: Zavornitsyn R S , Naumova L I , Milyaev M A , Pavlova A Y , Maksimova I K , Proglyado V V , Ustinov V V 
Published: November 2019

Abstract
Present work deals with methods for creating opposite pinning directions in micro-objects based on a spin valve by one thermomagnetic treatment. The methods are based on the thermomagnetic treatment in spin-flop state of synthetic antiferromagnet. We use splitting the magnetic structure in spin-flop state of synthetic antiferromagnet to form opposite pinning directions in different micro-objects by one thermomagnetic treatment. The positive characteristic (dR/dH) was obtained in the two sensor elements of the full Wheatstone bridge, and the negative characteristic (dR/dH) in the other two elements.
NMR studies of interlayer boundaries in Co/Cu superlattices
Authors: Popov V V , Bannikova N S , Blinov I V , Chuprakov S A , Krinitsina T P , Milyaev M A , Ustinov V V 
Published: November 2019

Abstract
Effects of Cu layer thicknesses and annealing temperature on structural features of Co/Cu superlattices have been studied by nuclear magnetic resonance (NMR), electron microscopy, X-ray diffraction and X-ray reflectometry. Determination of a fraction of perfect boundaries and of Co atoms in interfaces based on NMR studies is demonstrated. Correlation of these parameters with the probability of a single electron scattering event at an interface and magnetoresistance is analyzed.
Ion production in the 12C + 9Be interactions at GeV energies
Authors: Abramov B M , Borodin Yu A , Bulychjov S A , Dukhovskoy I A , Khanov A I , Krutenkova A P , Kulikov V V , Martemianov M A , Matsyuk M A , Turdakina E N 
Published: November 2019

Abstract
Differential cross sections for nuclear fragment yields at an angle of 3.5° in the fragmentation of carbon ions with an energy of 0.95 and 2.0 GeV/nucleon on a beryllium target have been measured. The momentum spectra of the fragments were used for testing predictions of few models of ion-ion interactions.