Observation of the intrinsic pinning of a magnetic domain wall in a ferromagnetic nanowire

被引：0

作者：

Koyama T. ^{[1
]}

Chiba D. ^{[1
,2
]}

Ueda K. ^{[1
]}

Kondou K. ^{[1
]}

Tanigawa H. ^{[3
]}

Fukami S. ^{[3
]}

Suzuki T. ^{[3
]}

Ohshima N. ^{[3
]}

Ishiwata N. ^{[3
]}

Nakatani Y. ^{[4
]}

Kobayashi K. ^{[1
]}

Ono T. ^{[1
]}

机构：

[1] Institute for Chemical Research, Kyoto University, Gokasho, Uji

[2] PRESTO, Japan Science and Technology Agency, Saitama 322-0012

[3] NEC Corporation, Chuo-ku, Sagamihara, Kanagawa 229-1198

[4] University of Electro-communications, Chofu

来源：

Nature Materials | 2011年 / 10卷 / 3期

基金：

日本学术振兴会;

关键词：

D O I：

10.1038/nmat2961

中图分类号：

学科分类号：

摘要：

The spin transfer torque is essential for electrical magnetization switching. When a magnetic domain wall is driven by an electric current through an adiabatic spin torque, the theory predicts a threshold current even for a perfect wire without any extrinsic pinning. The experimental confirmation of this -intrinsic pinningg-however, has long been missing. Here, we give evidence that this intrinsic pinning determines the threshold, and thus that the adiabatic spin torque dominates the domain wall motion in a perpendicularly magnetized Co/Ni nanowire. The intrinsic nature manifests itself both in the field-independent threshold current and in the presence of its minimum on tuning the wire width. The demonstrated domain wall motion purely due to the adiabatic spin torque will serve to achieve robust operation and low energy consumption in spintronic devices. © 2011 Macmillan Publishers Limited. All rights reserved.

引用

页码：194 / 197

页数：3

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