Effect of Enhanced Damping Due to Spin-Motive Force on Field-Driven Domain Wall Motion
2010; IEEE Magnetics Society; Volume: 46; Issue: 6 Linguagem: Inglês
10.1109/tmag.2010.2041909
ISSN1941-0069
AutoresJung-Hwan Moon, Soo-Man Seo, Kyung‐Jin Lee,
Tópico(s)ZnO doping and properties
ResumoTemporal and spatial variation of magnetization generates an additional damping torque due to spin-motive force. We performed semi-one-dimensional (1-D) and two-dimensional (2-D) micromagnetic simulations to investigate effect of the additional damping on the field-driven transverse wall dynamics in a magnetic nanowire. At the magnetic field above the Walker breakdown field, the additional damping due to the spin-motive force causes an increase of domain wall velocity. In semi-1-D model, the amount of increased domain wall velocity is linearly proportional to the external magnetic field as predicted by theory. However, in 2-D model, it is inversely proportional to the field owing to the periodic injection of antivortex.
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