Electrodynamics of hard superconductors in crossed magnetic fields |
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Authors: | I F Voloshin A V Kalinov S E Savel’ev L M Fisher V A Yampolskii F Perez Rodriguez |
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Institution: | (1) All-Russian Electrical Engineering Institute, 111250 Moscow, Russia;(2) Institute for Radiophysics and Electronics, 310085 Khar’kov, Ukraine;(3) Institute of Physics of Puebla Autonomous University, Mexico |
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Abstract: | A model systematically accounting for the cutting of Abrikosov flux lines has been developed for the critical state of a hard
superconductor in crossed dc and ac magnetic fields. The electrodynamic equations have been derived by minimizing the Gibbs
free energy calculated using the proposed two-velocity hydrodynamic model. One velocity describes the motion of the vortex
lattice as a whole, and the other describes the relative motion of the two intersecting sublattices. The resulting equations
yield as special cases the previously known electrodynamic equations for hard superconductors. The model provides a natural
explanation for the suppression of dc magnetization by a transverse ac magnetic field observed in our experiments.
Zh. éksp. Teor. Fiz. 111, 1071–1084 (March 1997) |
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