Driven dynamic mode splitting of the magnetic vortex translational resonance

被引：49

作者：

Buchanan, K. S. ^{[1
]}

Grimsditch, M. ^{[2
]}

Fradin, F. Y. ^{[2
]}

Bader, S. D. ^{[1
,2
]}

Novosad, V. ^{[2
]}

机构：

[1] Argonne Natl Lab, Ctr Nanosclae Mat, Argonne, IL 60439 USA

[2] Argonne Natl Lab, Div Mat Sci, Argonne, IL 60439 USA

来源：

PHYSICAL REVIEW LETTERS | 2007年 / 99卷 / 26期

关键词：

D O I：

10.1103/PhysRevLett.99.267201

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

A magnetic vortex in a restricted geometry possesses a nondegenerate translational excitation that corresponds to circular motion of its core at a characteristic frequency. For 40-nm thick, micron-sized permalloy elements, we find that the translational-mode microwave absorption peak splits into two peaks that differ in frequency by up to 25% as the driving field is increased. An analysis of micromagnetic equations shows that for large driving fields two stable solutions emerge.

引用

页数：4

共 35 条

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