Threshold current of domain wall motion under extrinsic pinning, β-term and non-adiabaticity

被引：88

作者：

Tatara, Gen

Takayama, Toshihiko

Kohno, Hiroshi

Shibata, Junya

Nakatani, Yoshinobu

Fukuyama, Hidetoshi

机构：

[1] Tokyo Metropolitan Univ, Grad Sch Sci, Hachioji, Tokyo 1920397, Japan

[2] JST, PRESTO, Kawaguchi, Saitama 3320012, Japan

[3] Osaka Univ, Grad Sch Engn Sci, Toyonaka, Osaka 5608531, Japan

[4] RIKEN, Inst Phys & Chem Res, FRS, Wako, Saitama 3510198, Japan

[5] Univ Electrocommun, Dept Comp Sci, Chofu, Tokyo 1828585, Japan

[6] Tohoku Univ, Mat Res Inst, Int Frontier Ctr Adv Mat, Aoba Ku, Sendai, Miyagi 9808577, Japan

来源：

JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN | 2006年 / 75卷 / 06期

关键词：

spin torque; domain wall; threshold current; MRAM;

D O I：

10.1143/JPSJ.75.064708

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

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 beta-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 beta.

引用

页数：7

共 37 条

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