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arXiv · 1209.1375

Excitation modes of vortices in sub-micron magnetic disks

Ricardo Zarzuela·Eugene Chudnovsky·Javier Tejada
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Abstract

Classical and quantum theory of spin waves in the vortex state of a mesoscopic sub-micron magnetic disk has been developed with account of the finite mass density of the vortex. Oscillations of the vortex core resemble oscillations of a charged string in a potential well in the presence of the magnetic field. Conventional gyroscopic frequency appears as a gap in the spectrum of spin waves of the vortex. The mass of the vortex has been computed that agrees with experimental findings. Finite vortex mass generates a high-frequency branch of spin waves. Effects of the external magnetic field and dissipation have been addressed.

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Ricardo Zarzuela, Eugene Chudnovsky, Javier Tejada. 2012-09-06. Excitation modes of vortices in sub-micron magnetic disks. https://doi.org/10.1103/physrevb.87.014413

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