Nonlinear mode conversion in monodomain magnetic squares

Mikhail Kostylev; Vladislav E. Demidov; Ulf-Hendrik HansenSergej O. Demokritov

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Nonlinear mode conversion in monodomain magnetic squares

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摘要

Modifications of the spatial distributions of dynamic magnetization corresponding to spin-wave eigenmodes of magnetic squares subjected to a strong microwave excitation field have been studied experimentally and theoretically. We show that an increase of the excitation power leads to nonlinear generation of long-wavelength spatial harmonics caused by the nonlinear cross coupling between the eigenmodes. The analysis of the experimental data shows that this process is mainly governed by the action of the nonlinear spin-wave damping. This conclusion is further supported by numerical calculations based on the complex Ginzburg-Landau equation, phenomenologically taking into account the nonlinear damping.

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《Physical review, B. Condensed matter and materials physics》 |2007年第22期|224414.1-224414.7|共9页
作者
Mikhail Kostylev; Vladislav E. Demidov; Ulf-Hendrik HansenSergej O. Demokritov;
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School of Physics, University of Western Australia, M013, Stirling Highway, 6009 Crawley, Western Australia, Australia;

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正文语种英语
中图分类固体物理学;
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dynamic properties (dynamic susceptibility; spin waves; spin diffusion; dynamic scaling; etc.); spin waves; ferromagnetic; antiferromagnetic; and ferrimagnetic resonances; spin-wave resonance; magnetic properties of nanostructures;

Nonlinear mode conversion in monodomain magnetic squares

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