Search query: magnetic field electric field

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abstract: Starting with a Kondo lattice model type Hamiltonian, the effects of the magnetic field, electric field, and magnetic anisotropic energy on the magnetic properties of the Fe/GaSb diluted magnetic s.
author_names: Mesfin Birile Woldetsadik

Pooran Singh

Chernet Amente Geffe
title: Effects of magnetic field, electric field, and magnetic anisotropic energy on the magnetic properties of Fe alloyed GaSb diluted magnetic semiconductor
year: 2020

abstract: Electrochemical machining (ECM) has a strong advantage in dealing with difficult to machine materials and complex shaped parts. In order to improve machining accuracy, some researchers, based on the principle of interactions between the magnetic field and electric field, proposed the magnetic field assisted ECM technology that is advantageous in improving surface roughness and facilitating material removal amount. Pitifully, little attention has been attached to effects of the coupled magnetic field, electric field, and electrolyte motion on the amount of materials removed. This paper aims to find out how arrangements of magnetic fields and coupled of the three energy (which were magnetic field, electric field, and electrolyte motion) will work on the amount of material removed in ECM. Here established a Navier Stokes equation and a model of material removal amount in the anode under the electromagnetic field. Physical and mathematical models of the electrolyte's flow characteristics and material removal amount were constructed through the COMSOL Multiphysics software, and simulations were carried out. An experiment was implemented to test models and the simulations. Simulation results indicated that different arrangements of the magnetic field had delivered different impacts on flow characteristics of the flow field and material removal amount. Experiment results revealed that the material removal amount had increased regardless of arrangements of magnetic fields and that the flow rate of the electrolyte had played a role in this connection. The study involved in this paper showed that the introduction of the magnetic field worked favorably to lift the material removal amount and that arrangements of magnetic fields also had the same effect in this regard. Also, it was found that a growing flow rate of the electrolyte had hindered the increases of the material removal amount.
author_names: Li Long

Ma Baoji

Wang Ruifeng

Du Lingqi
title: The coupled effect of magnetic field, electric field, and electrolyte motion on the material removal amount in electrochemical machining
year: 2017

abstract: A qualitative study is performed on plasma transport modelling in the inner magnetosphere, revealing the significance of a model use choice and its parameterization. First, we examine particle transport using comparative analysis of both magnetic and electric field models. This work reveals that the electric field plays an important role in understanding particle dynamics and the models lead to various results in terms of plasma source, energy and particle trajectory. We then concentrate particularly on proton loss assessment considering the charge exchange phenomenon. For that, models are needed to provide a neutral hydrogen density estimation. So, exospheric models were tested in light of the Dynamics Explorer 1 measurements analysed by Rairden.
author_names: Angelique Woelffle

D Boscher

Iannis Dandouras
title: Plasma transport modelling in the inner magnetosphere: effects of magnetic field, electric field and exospheric models
year: 2011

abstract: A linked magnetic field electric sector scan for which (B/E) is constant selectively records first field free region metastable peaks representing loss of the same neutral fragment. The constant neutral metastable ion spectra produced by this scan should provide information about the presence and location of particular functional groups beyond that which is available from focused mass spectra. Constant neutral linked scans can be obtained consecutively with focused spectra and with B/E and B2/E linked scans by simple extension of a computerized B E scanning method developed previously.
author_names: William F Haddon
title: The constant neutral linked magnetic field electric sector scan
year: 1980

abstract: Controlling magnetism with electric fields is a key challenge to develop future energy efficient devices. The present magnetic information technology is mainly based on writing processes requiring either local magnetic fields or spin torques, but it has also been demonstrated that magnetic properties can be altered on the application of electric fields. This has been ascribed to changes in magnetocrystalline anisotropy caused by spin dependent screening and modifications of the band structure, changes in atom positions or differences in hybridization with an adjacent oxide layer. However, the switching between states related by time reversal, for example magnetization up and down as used in the present technology, is not straightforward because the electric field does not break time reversal symmetry. Several workarounds have been applied to toggle between bistable magnetic states with electric fields, including changes of material composition as a result of electric fields. Here we demonstrate that local electric fields can be used to switch reversibly between a magnetic skyrmion and the ferromagnetic state. These two states are topologically inequivalent, and we find that the direction of the electric field directly determines the final state. This observation establishes the possibility to combine electric field writing with the recently envisaged skyrmion racetrack type memories.
author_names: Pin-Jui Hsu

Andre Kubetzka

Aurore Finco

Niklas Romming

Kirsten von Bergmann

Roland Wiesendanger
title: Electric field driven switching of individual magnetic skyrmions.
venue: Nature nanotechnology
year: 2017

abstract: Macro statistics theory is applied.Rectangle plane magnetron sputtering target is taken as an example to analyze the method to keep the target's functional model well and optimization condition to get high quality magnetron sputtering thin film under different magnetic field,electrical field and vacuum degree conditions.It indicates that an affinity exists among the magnetron field,electrical field and vacuum degree.For gaining perfect atomic deposition phase through Magnetron Sputtering,the parameters of magnetron field,electrical field and vacuum degree have to be set properly.The parametric setting of magnetron field,electrical field and vacuum degree has to follow intrinsic rules and relations of them.
author_names: Zhang Jian
title: THE ANALYSIS ON MAGNETIC FIELD,ELECTRIC FIELD AND DEGREE OF VACUUM FOR MAGNETRON SPUTTERING
year: 2007

abstract: The Electric and Magnetic Field Instrument and Integrated Science (EMFISIS) investigation on the NASA Radiation Belt Storm Probes (now named the Van Allen Probes) mission provides key wave and very low frequency magnetic field measurements to understand radiation belt acceleration, loss, and transport. The key science objectives and the contribution that EMFISIS makes to providing measurements as well as theory and modeling are described. The key components of the instruments suite, both electronics and sensors, including key functional parameters, calibration, and performance, demonstrate that EMFISIS provides the needed measurements for the science of the RBSP mission. The EMFISIS operational modes and data products, along with online availability and data tools provide the radiation belt science community with one the most complete sets of data ever collected.
author_names: Craig A Kletzing

William S Kurth

Mario H Acuna

Robert J Macdowall

Roy B Torbert

T F Averkamp

D Bodet

Scott R Bounds

M Chutter

John E P Connerney

Darren Crawford

J S Dolan

Richard Dvorsky

George B Hospodarsky

Jeromoe J Howard

Vania K Jordanova

R A Johnson

Donald L Kirchner

Brian Thomas Mokrzycki

Gerald Needell

James L Odom

D Mark

R Pfaff

James R Phillips

C Piker

S L Remington

Douglas Rowland

Ondrej Santolik

Richard G Schnurr

Dave Sheppard

C W Smith

Richard M Thorne

J Tyler
title: The Electric and Magnetic Field Instrument Suite and Integrated Science (EMFISIS) on RBSP
year: 2013

abstract: Improving low energy beam performance has been one of the most important technological challenges for ion implanters in order to maximize the throughput for shallow junction applications. Major difficulties in obtaining high current beams at low energy can be attributed to high beam divergence due to the intrinsic emittance growth and high space charge at the extraction region. This paper identifies the various problems associated with the low energy beam extraction and transport and proposes possible solutions in terms of source plasma, extraction optics and magnetic field.
author_names: H Ito

Ngoi Kok Ann Bryan
title: Low energy beam extraction in terms of magnetic field, electric field and ion optics
venue: Proceedings of 11th International Conference on Ion Implantation Technology
year: 1996

abstract: Improving low energy beam performance has been one of the most important technological challenges for ion implanters in order to maximize the throughput for shallow junction applications. Major difficulties in obtaining high current beams at low energy can be attributed to high beam divergence due to the intrinsic emittance growth and high space charge at the extraction region. This paper identifies the various problems associated with low energy beam extraction and transport and proposes possible solutions in terms of source plasma, extraction optics and magnetic field.
author_names: H Ito

Ngoi Kok Ann Bryan
title: Low energy beam extraction in terms of magnetic field, electric field and ion optics
venue: Proceedings of 11th International Conference on Ion Implantation Technology
year: 1996

abstract: BACKGROUND Various transcranial magnetic stimulation (TMS) coil designs are available or have been proposed. However, key coil characteristics such as electric field focality and attenuation in depth have not been adequately compared. Knowledge of the coil focality and depth characteristics can help TMS researchers and clinicians with coil selection and interpretation of TMS studies. OBJECTIVE To quantify the electric field focality and depth of penetration of various TMS coils. METHODS The electric field distributions induced by 50 TMS coils were simulated in a spherical human head model using the finite element method. For each coil design, we quantified the electric field penetration by the half value depth, d(1/2) and focality by the tangential spread, S(1/2) defined as the half value volume (V(1/2) divided by the half value depth, S(1/2) V(1/2)/d(1/2) RESULTS The 50 TMS coils exhibit a wide range of electric field focality and depth, but all followed a depth focality tradeoff: coils with larger half value depth cannot be as focal as more superficial coils. The ranges of achievable d(1/2) are similar between coils producing circular and figure 8 electric field patterns, ranging 1.0 3.5 cm and 0.9 3.4 cm, respectively. However, figure 8 field coils are more focal, having S(1/2) as low as 5 cm(2) compared to 34 cm(2) for circular field coils. CONCLUSIONS For any coil design, the ability to directly stimulate deeper brain structures is obtained at the expense of inducing wider electrical field spread. Novel coil designs should be benchmarked against comparison coils with consistent metrics such as d(1/2) and S(1/2)
author_names: Zhi-De Deng

Sarah H Lisanby

Angel V Peterchev
title: Electric field depth focality tradeoff in transcranial magnetic stimulation: Simulation comparison of 50 coil designs
venue: Brain Stimulation
year: 2013