Hysteresis-free switching between vortex and collinear magnetic states

被引：15

作者：

Ostman, Erik ^{[1
]}

Arnalds, Unnar B. ^{[1
]}

Melander, Emil ^{[1
]}

Kapaklis, Vassilios ^{[1
]}

Palsson, Gunnar K. ^{[2
,3
]}

Saw, Alexander Y. ^{[2
,3
]}

Verschuuren, Marc A. ^{[4
]}

Kronast, Florian ^{[5
]}

Papaioannou, Evangelos Th ^{[1
]}

Fadley, Charles S. ^{[2
,3
]}

Hjorvarsson, Bjorgvin ^{[1
]}

机构：

[1] Uppsala Univ, Dept Phys & Astron, SE-75120 Uppsala, Sweden

[2] Univ Calif Davis, Dept Phys, Davis, CA 95016 USA

[3] Univ Calif Berkeley, Lawrence Berkeley Natl Lab, Div Mat Sci, Berkeley, CA 94720 USA

[4] Philips Res Labs, Eindhoven, Netherlands

[5] Helmholtz Zentrum Berlin Mat & Energie, D-12489 Berlin, Germany

来源：

NEW JOURNAL OF PHYSICS | 2014年 / 16卷

基金：

瑞典研究理事会;

关键词：

magnetic nanostructures; magnetic vortices; thermal fluctuations; ARTIFICIAL SPIN-ICE; PERMALLOY; ALLOYS;

D O I：

10.1088/1367-2630/16/5/053002

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We demonstrate a lossless switching between vortex and collinear magnetic states in circular FePd disks arranged in a square lattice. Above a bifurcation temperature (T-e)e we show that thermal fluctuations are enough to facilitate flipping between the two distinctly different magnetic states. We find that the temperature dependence of the vortex annihilation and nucleation fields can be described by a simple power law relating them to the saturation magnetization.

引用

页数：9

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