Tunable eigenmodes of coupled magnetic vortex oscillators

被引：25

作者：

Haenze, Max ^{[1
,2
]}

Adolff, Christian F. ^{[1
,2
]}

Weigand, Markus ^{[3
]}

Meier, Guido ^{[1
,2
,4
]}

机构：

[1] Univ Hamburg, Inst Angew Phys, D-20355 Hamburg, Germany

[2] Univ Hamburg, Zentrum Mikrostrukturforsch, D-20355 Hamburg, Germany

[3] Max Planck Inst Intelligente Syst, D-70569 Stuttgart, Germany

[4] Hamburg Ctr Ultrafast Imaging, D-22761 Hamburg, Germany

来源：

APPLIED PHYSICS LETTERS | 2014年 / 104卷 / 18期

关键词：

Equations of motion - Iron alloys - Nickel alloys - Vortex flow;

D O I：

10.1063/1.4875618

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

We study the magnetization dynamics of coupled vortices in arrays of Permalloy disks via analytical calculations and scanning transmission x-ray microscopy. The Thiele approach is used to derive linear equations of motion of the vortices. Thereby, vortex motions following a nanosecond field pulse are described by a superposition of eigenmodes that depend on the vortex polarizations. Eigenmodes are calculated for a specific polarization pattern of a 3 x 3 vortex array. With magnetic field pulses distinct oscillations are excited and imaged in space and time. The calculated eigenmodes precisely describe the measured oscillations. (C) 2014 AIP Publishing LLC.

引用

页数：4

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