Nonlinear domain-wall velocity enhancement by spin-polarized electric current

被引：196

作者：

Beach, G. S. D. ^{[1
]}

Knutson, C. ^{[1
]}

Nistor, C. ^{[1
]}

Tsoi, M. ^{[1
]}

Erskine, J. L. ^{[1
]}

机构：

[1] Univ Texas, Dept Phys, Austin, TX 78712 USA

来源：

PHYSICAL REVIEW LETTERS | 2006年 / 97卷 / 05期

关键词：

EXCHANGE INTERACTION; PERMALLOY-FILMS; BLOCH LINES; MOTION; PROPAGATION; NANOWIRES; FORCE; FERROMAGNETS; DYNAMICS; STRIPS;

D O I：

10.1103/PhysRevLett.97.057203

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The interaction between a dc spin-polarized electric current and a magnetic domain wall in a Permalloy nanowire was studied by high-bandwidth scanning Kerr polarimetry. The full functional dependence of wall velocity on electric current and magnetic field is presented. With the pinning potential nulled by a field, current-induced velocity enhancements exceeded 35 m/s at a current density of similar to 6x10(11) A/m(2). This large enhancement, more than 10 times that found in pinning-dominated experiments, results in part from an interaction that is nonlinear in current and independent of current direction.

引用

页数：4

共 25 条

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