Observation of anisotropic energy transfer in magnetically coupled magnetic vortex pair

We have experimentally investigated the energy transfer and storage in the magnetostatically coupled vortices in a pair of disks. By measuring the frequency dependence of the rectified dc voltage, we observed a specific gyrating motion due to anomalous energy storage at the off-resonant frequency fo...

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Veröffentlicht in:Applied physics letters 2016-06, Vol.108 (24)
Hauptverfasser: Hasegawa, N., Sugimoto, S., Kumar, D., Barman, S., Barman, A., Kondou, K., Otani, Y.
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Sprache:eng
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Zusammenfassung:We have experimentally investigated the energy transfer and storage in the magnetostatically coupled vortices in a pair of disks. By measuring the frequency dependence of the rectified dc voltage, we observed a specific gyrating motion due to anomalous energy storage at the off-resonant frequency for anti-parallel polarities. Micromagnetic simulations based on the Landau-Lifshitz-Gilbert equation qualitatively reproduce the experimental results and reveal that the behavior arises from the anisotropic energy transfer, i.e., the modulation of effective damping constant of the pair disks, originating from the phase difference between coupled vortex cores. These findings can be of use in magnetic vortex based logic operations.
ISSN:0003-6951
1077-3118
DOI:10.1063/1.4953600