The Influence of the Magnetic Field on Electrically Induced Domain Wall Motion

2015 ◽  
Vol 233-234 ◽  
pp. 443-446 ◽  
Author(s):  
D.A. Sechin ◽  
E.P. Nikolaeva ◽  
A.P. Pyatakov ◽  
A.B. Nikolaev ◽  
T.B. Kosykh
Keyword(s):  
Magnetic Field ◽  
Domain Wall ◽  
Electric Field ◽  
Wall Motion ◽  
Domain Walls ◽  
Domain Wall Motion ◽  
Electric Polarization ◽  
Measured Velocity ◽  
Iron Garnet ◽  
The Magnetic Field

Domain walls in iron garnet films demonstrate magnetoelectric properties that manifest themselves as a displacement induced by inhomogeneous electric field. In this paper the results of the study of electric field induced domain wall dynamics and its dependence on external magnetic field are presented. The measured velocity of the electrically induced domain wall motion increased by an order with the magnetic field applied perpendicular to the domain wall plane. The numerical simulation shows that the observed behaviour of the domain wall can be explained by magnetic field induced modification of its internal micromagnetic structure and enhancement of the electric polarization associated with the wall.

Electric Field Driven Magnetic Domain Wall Motion in Iron Garnet Films

2009 ◽  
Vol 152-153 ◽  
pp. 143-146 ◽  
Author(s):  
A. Logginov ◽  
G. Meshkov ◽  
A. Nikolaev ◽  
E. Nikolaeva ◽  
A. Pyatakov ◽  
...  
Keyword(s):  
Domain Wall ◽  
Electric Field ◽  
Wall Motion ◽  
Magnetic Domain ◽  
Domain Wall Motion ◽  
Gadolinium Gallium Garnet ◽  
Magnetic Domain Wall ◽  
Garnet Films ◽  
Dynamic Observation ◽  
Iron Garnet

The room temperature magnetoelectric effect was observed in epitaxial iron garnet films that appeared as magnetic domain wall motion induced by electric field. The films grown on gadolinium-gallium garnet substrates with various crystallographic orientations were examined. The effect was observed in (210) and (110) films and was not observed in (111) films. Dynamic observation of the domain wall motion in 800 kV/cm electric field pulses gave the domain wall velocity in the range 30÷50 m/s. Similar velocity was achieved in magnetic field pulse about 50 Oe.

scholarly journals The Dynamics of Domain Wall Motion in Spintronics

2020 ◽  
Vol 6 (3) ◽  
pp. 40
Author(s):  
Diego Bisero
Keyword(s):  
Magnetic Field ◽  
Thin Film ◽  
External Magnetic Field ◽  
Domain Wall ◽  
Effective Mass ◽  
General Equation ◽  
Wall Motion ◽  
Domain Walls ◽  
Domain Wall Motion ◽  
Magnetic Thin Film

A general equation describing the motion of domain walls in a magnetic thin film in the presence of an external magnetic field has been reported in this paper. The equation includes all the contributions from the effects of domain wall inertia, damping and stiffness. The effective mass of the domain wall, the effects of both the interaction of the DW with the imperfections in the material and damping have been calculated.

Direct Observation of Reverse Magnetic Domain and Magnetic Domain Wall Motion in Nd-Fe-B Magnet at High Temperature by Lorentz Microscop

MRS Advances ◽  
2016 ◽  
Vol 1 (3) ◽  
pp. 241-246 ◽  
Author(s):  
Toshimasa Suzuki ◽  
Koichi Kawahara ◽  
Masaya Suzuki ◽  
Kenta Takagi ◽  
Kimihiro Ozaki
Keyword(s):  
Magnetic Field ◽  
External Magnetic Field ◽  
Domain Wall ◽  
Wall Motion ◽  
Domain Walls ◽  
Magnetic Domain ◽  
Domain Wall Motion ◽  
Thin Foil ◽  
Magnetic Domain Wall

ABSTRACTWe conducted the in-situ observations of the magnetic domain structure change in Nd-Fe-B magnets at high temperature by transmission electron microscopy (TEM) / Lorentz microscopy with applying an external magnetic field. Prior to observation, a thin foil was magnetized by an external magnetic field of 2.0 T to almost saturation, then the magnetic domain structures were observed by the Fresnel mode with in-situ heating. At 225°C, reverse magnetic domains were found to generate in the thin foil sample without applying an external magnetic field. When we applied a magnetic field on the same direction to the pre-magnetization direction at 225°C, one magnetic domain wall was pinned by a grain boundary and the other magnetic domain wall moved. As the results, the reverse magnetic domain shrank then annihilated. When we cut the applied magnetic field, the reverse magnetic domain generated at almost the same location. On the other hand, when we applied a magnetic field to the foils in the opposite direction, the reverse domain started to grow, i.e., magnetic domain walls started to move. The observation results of the shrink or growth of the reverse domain showed that the pinning effect of grain boundary against domain wall motion would be different depending on the applied magnetic field direction. Moreover, domain walls was observed to be pinned by grain boundaries at elevated temperature, so that the coercivity of Nd-Fe-B magnet would occur by pinning mechanism.

Fast magnetic field penetration into low resistivity plasma

2017 ◽  
Vol 83 (1) ◽  
Author(s):  
Amnon Fruchtman
Keyword(s):  
Magnetic Field ◽  
Energy Dissipation ◽  
Electric Field ◽  
Density Gradient ◽  
Magnetic Energy ◽  
Measured Velocity ◽  
Magnetic Field Penetration ◽  
The Magnetic Field ◽  
Uniform Plasma ◽  
Field Penetration

Penetration of a magnetic field into plasma that is faster than resistive diffusion can be induced by the Hall electric field in a non-uniform plasma. This mechanism explained successfully the measured velocity of the magnetic field penetration into pulsed plasmas. Major related issues have not yet been resolved. Such is the theoretically predicted, but so far not verified experimentally, high magnetic energy dissipation, as well as the correlation between the directions of the density gradient and of the field penetration.

Magnetic field-induced domain wall motion in cylindrical nanowires

2015 ◽  
Author(s):  
A. Wartelle ◽  
C. Thirion ◽  
R. Afid ◽  
S. Jamet ◽  
S. Da Col ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Domain Wall ◽  
Wall Motion ◽  
Domain Wall Motion
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