Publication
Journal of Applied Physics
Paper

Magnetic relaxation and critical current in an YBaCuO crystal

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Abstract

We have measured the temperature dependence of magnetic relaxation and critical current in an YBaCuO single crystal. Unusually strong time-logarithmic magnetic relaxation is observed. The relaxation rate increases initially with temperature, peaks at ≅25 K and slows down at higher temperatures. The results, interpreted with a thermally activated flux model, yield a low-temperature pinning energy U0≅0.02 eV. This low pinning energy results in an unusually rapid decrease of the critical current as temperature is increased.

Date

01 Dec 1988

Publication

Journal of Applied Physics

Authors

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