Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1865958 | Physics Letters A | 2008 | 5 Pages |
Abstract
It is used the mechanical method of Abrikosov vortex stimulated dynamics investigation in superconductors. With its help it was studied relaxation phenomena in vortex matter of high-temperature superconductors. It established that pulsed magnetic fields change the course of relaxation processes taking place in vortex matter. The study of the influence of magnetic pulses differing by their durations and amplitudes on vortex system of strongly anisotropic high-temperature superconductors system Bi1.7Pb0.3Sr2Ca2Cu3O10âδ showed the presence of threshold phenomena. The small duration pulses do not change the course of relaxation processes taking place in vortex matter. When the duration of pulses exceeds some critical value (threshold), then their influence changes the course of relaxation process which is revealed by stepwise change of relaxing mechanical moment Ïrel. These investigations showed that the time for formatting of Abrikosov vortex lattice in Bi1.7Pb0.3Sr2Ca2Cu3O10âδ is of the order of 150 μs which on the order of value exceeds the time necessary for formation of a single vortex observed in isotropic high-temperature superconductor HoBa2Cu3O7âδ and on two orders exceeds the creation time of a single vortex observed in classical type II superconductors.
Related Topics
Physical Sciences and Engineering
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Authors
J.G. Chigvinadze, S.M. Ashimov, T.V. Machaidze,