Reduction of flux creep by heat pulses

Reduction of flux creep by heat pulses

We investigated the possibility of reducing the giant flux creep in high-temperature superconductors by temporarily increasing the temperature T above the operating temperature T0, after the critical state is created at T0. This T increase leads to a supercritical state which decays rapidly so that,...

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Bibliographic Details
Published in:Applied physics letters Vol. 72; no. 1; pp. 112 - 114
Main Authors: Levin, G. A., Almasan, C. C., Gajewski, D. A., Maple, M. B.
Format: Journal Article
Language:English
Published: 05-01-1998
Online Access:Get full text
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Summary:We investigated the possibility of reducing the giant flux creep in high-temperature superconductors by temporarily increasing the temperature T above the operating temperature T0, after the critical state is created at T0. This T increase leads to a supercritical state which decays rapidly so that, when T is decreased back to T0, the superconductor is in the subcritical state. We have found that both the maximum persistent current and the relaxation rate are hysteretic and differ substantially from the corresponding quantities measured after flux annealing.
ISSN:0003-6951
1077-3118
DOI:10.1063/1.120661