Roles of the magnetic field and electric current in thermally activated domain wall motion in a submicrometer magnetic strip with perpendicular magnetic anisotropy

被引：30
|
作者：
Emori, Satoru [1 ]
Beach, Geoffrey S. D. [1 ]
机构：
[1] MIT, Dept Mat Sci & Engn, Cambridge, MA 02139 USA
来源：
JOURNAL OF PHYSICS-CONDENSED MATTER | 2012年 / 24卷 / 02期
基金：
美国国家科学基金会;
关键词：
D O I：
10.1088/0953-8984/24/2/024214
中图分类号：
O469 [凝聚态物理学];
学科分类号：
070205 ;
摘要：
We have experimentally studied micrometer-scale domain wall (DW) motion driven by a magnetic field and an electric current in a Co/Pt multilayer strip with perpendicular magnetic anisotropy. The thermal activation energy for DW motion, along with its scaling with the driving field and current, has been extracted directly from the temperature dependence of the DW velocity. The injection of DC current resulted in an enhancement of the DW velocity independent of the current polarity, but produced no measurable change in the activation energy barrier. Through this analysis, the observed current-induced DW velocity enhancement can be entirely and unambiguously attributed to Joule heating.
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页数：7
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