Dynamical Pinning of a Domain Wall in a Magnetic Nanowire Induced by Walker Breakdown

被引：35

作者：

Tanigawa, Hironobu ^{[1
]}

Koyama, Tomohiro ^{[1
]}

Bartkowiak, Maciej ^{[1
]}

Kasai, Shinya ^{[1
]}

Kobayashi, Kensuke ^{[1
]}

Ono, Teruo ^{[1
]}

Nakatani, Yoshinobu ^{[2
]}

机构：

[1] Kyoto Univ, Inst Chem Res, Kyoto 6110011, Japan

[2] Univ Electrocommun, Tokyo 1828585, Japan

来源：

PHYSICAL REVIEW LETTERS | 2008年 / 101卷 / 20期

关键词：

D O I：

10.1103/PhysRevLett.101.207203

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Transmission probability of a domain wall through a magnetic nanowire is investigated as a function of the external magnetic field. A very intriguing phenomenon is found that the transmission probability shows a significant drop after exceeding the threshold driving field, which contradicts our intuition that a domain wall is more mobile in the higher magnetic field. The micromagnetics simulation reveals that the domain wall motion in the wire with finite roughness causes the dynamical pinning due to the Walker breakdown, which semiquantitatively explains our experimental results.

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页数：4

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