Direct observation of domain wall scattering in patterned Ni80Fe20 and Ni nanowires by current-voltage measurements -: art. no. 127201

被引：66

作者：

Lepadatu, S ^{[1
]}

Xu, YB ^{[1
]}

机构：

[1] Univ York, Dept Elect, Spintron Lab, York YO10 5DD, N Yorkshire, England

来源：

PHYSICAL REVIEW LETTERS | 2004年 / 92卷 / 12期

基金：

英国工程与自然科学研究理事会;

关键词：

D O I：

10.1103/PhysRevLett.92.127201

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We present measurements of domain wall resistivity, pinned by nanoconstrictions in single layer ferromagnetic wires of Ni80Fe20 and Ni. Unpinning domain walls from the constriction by current-induced switching allows for an unambiguous measurement of their resistivity changes, namely, 1.7% in Ni80Fe20 and 1.82% in Ni and both positive, which supports the theory of spin-dependent impurity scattering. By deriving an empirical relation for the various constriction widths, the large percentage changes of resistivity in ballistic nanocontacts are reproduced, showing a correlation between domain wall magnetoresistance and ballistic magnetoresistance.

引用

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页码：127201 / 1

页数：4

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