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arXiv · 1008.4323

Vortex Viscosity in Magnetic Superconductors Due to Radiation of Spin Waves

A. Shekhter·L. N. Bulaevskii·C. D. Batista
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Abstract

In type-II superconductors that contain a lattice of magnetic moments, vortices polarize the magnetic system inducing additional contributions to the vortex mass, vortex viscosity, and vortex-vortex interaction. Extra magnetic viscosity is caused by radiation of spin waves by a moving vortex. Like in the case of Cherenkov radiation, this effect has a characteristic threshold behavior and the resulting vortex viscosity may be comparable to the well-known Bardeen-Stephen contribution. The threshold behavior leads to an anomaly in the current-voltage characteristics, and a drop in dissipation for a current interval that is determined by the magnetic excitation spectrum.

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A. Shekhter, L. N. Bulaevskii, C. D. Batista. 2011-01-30. Vortex Viscosity in Magnetic Superconductors Due to Radiation of Spin Waves. https://doi.org/10.1103/physrevlett.106.037001

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