Nonlinear magnetic vortex gyration

被引：37

作者：

Drews, Andre ^{[1
,3
,4
]}

Krueger, Benjamin ^{[2
]}

Selke, Gunnar ^{[1
]}

Kamionka, Thomas ^{[3
,4
]}

Vogel, Andreas ^{[3
,4
]}

Martens, Michael ^{[3
,4
]}

Merkt, Ulrich ^{[3
,4
]}

Moeller, Dietmar ^{[1
]}

Meier, Guido ^{[3
,4
]}

机构：

[1] Univ Hamburg, Arbeitsbereich Tech Informat Syst, D-20255 Hamburg, Germany

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

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

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

来源：

PHYSICAL REVIEW B | 2012年 / 85卷 / 14期

关键词：

VORTICES; MOTION;

D O I：

10.1103/PhysRevB.85.144417

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Nonlinear motion of magnetic vortices in soft magnetic squares is investigated by micromagnetic simulations, analytical calculations, and broadband ferromagnetic resonance measurements. Increasing amplitudes of alternating unidirectional spin currents and magnetic fields cause the shapes of the trajectories to approach the shape of the sample and shift the resonance frequency of vortex gyration. We show that it is the thickness of the magnetic element that determines whether the resonance frequency shifts to the red or to the blue. A nonlinear equation of motion based on the Thiele equation reproduces the simulated and measured results.

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页数：7

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