Nanometer scale observation of high efficiency thermally assisted current-driven domain wall depinning

被引：145

作者：

Ravelosona, D

Lacour, D

Katine, JA

Terris, BD

Chappert, C

机构：

[1] San Jose Res Ctr, Hitachi Global Storage Technol, San Jose, CA 95120 USA

[2] Univ Paris 11, Inst Elect Fondamentale, CNRS, UMR 8622, F-91405 Orsay, France

来源：

PHYSICAL REVIEW LETTERS | 2005年 / 95卷 / 11期

关键词：

D O I：

10.1103/PhysRevLett.95.117203

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Nanometer scale observation of the depinning of a narrow domain wall (DW) under a spin current is reported. We studied similar to 12 nm wide 1D Bloch DWs created in thin films exhibiting perpendicular magnetic anisotropy. Magnetotransport measurements reveal thermally assisted current-driven DW motion between pinning sites separated by as little as 20 nm. The efficiency of current-driven DW motion assisted by thermal fluctuations is measured to be orders of magnitude higher than has been found for in-plane magnetized films, allowing us to control DW motion on a nanometer scale at low current densities.

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页数：4

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