磁壁在磁場及極化自旋電流下之運動行為

One-Dimentional Wall Motion Driven by Magnetic Field and Spin-Polarized Current

楊毅楨(Yi-Chen Yang)

指導教授 ： 張慶瑞

國立臺灣大學/理學院/物理研究所/碩士(2006年)

https://doi.org/10.6342/NTU.2006.02995

摘要

無資料

關鍵字

磁壁

並列摘要

Abstract
When a spin-polarized current ‡ows through a ferromagnet, the local
magnetization receives a spin transfer torque. In one-dimention approxi-
mations, we solve the Landau-Lifshitz-Gilbert equation along with two spin
torque terms, both analytically and numerically, to realize the behavior of a
domain wall under the in‡uence of the spin-polarized current. As a …rst step,
we focus on the system of domain wall within a perfect magnetic nanowire.
Secondly, we consider the pinning case which may be caused by doping a
high-Ku material into the system. By numerically solving the LLG equation,
we …nd some characteristics of domain-wall motion under the spin-polarized
current. In the presence of domain-wall pinning centers, we also de…ned the
depinning …eld and construct a phase diagram for the domain-wall.

並列關鍵字

Domain Wall Motion ； Spin-Polarized Current

參考文獻

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