Threshold Current of Domain Wall Motion under Extrinsic Pinning, β-Term and Non-Adiabaticity(Condensed matter: electronic structure and electrical, magnetic, and optical properties)
Threshold Current of Domain Wall Motion under Extrinsic Pinning, β-Term and Non-Adiabaticity(Condensed matter: electronic structure and electrical, magnetic, and optical properties)
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DOI：
10.1143/jpsj.75.064708
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发表时间：
2006-06
影响因子：
1.7
通讯作者：
G. Tatara;T. Takayama;H. Kohno;J. Shibata;Y. Nakatani;H. Fukuyama
中科院分区：
文献类型：
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作者：
G. Tatara;T. Takayama;H. Kohno;J. Shibata;Y. Nakatani;H. Fukuyama
从集体坐标下畴壁运动方程出发，对铁磁体中自旋极化电流作用下畴壁运动的阈值电流进行了理论研究。考虑了非绝热性和Landau-Lifshitz方程中的β项的影响，这些影响在壁面运动方程中用β项来描述。结果表明，存在四种不同的区域，其特征在于阈值对外钉扎、难轴磁各向异性、非绝热性和β的不同依赖性。
Threshold current of domain wall motion under spin-polarized electric current in ferromagnets is theoretically studied based on the equation of motion of a wall in terms of collective coordinates. Effects of non-adiabaticity and a so-called β-term in Landau–Lifshitz equation, which are described by the same term in the equation of motion of a wall, are taken into account as well as extrinsic pinning. It is demonstrated that there are four different regimes characterized by different dependence of threshold on extrinsic pinning, hard-axis magnetic anisotropy, non-adiabaticity and β.