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Long Time Power Law Magnetic Relaxation in Detwinned YBa2Cu3O7-δ Single Crystals

Published online by Cambridge University Press:  26 February 2011

Lu Zhang ,
J. Z. Liu ,
M. D. Lan ,
P. Klavins  and
R. N. Shelton
Lu Zhang
Affiliation:
University of California, Davis, CA 95616
J. Z. Liu
Affiliation:
University of California, Davis, CA 95616
M. D. Lan
Affiliation:
University of California, Davis, CA 95616
P. Klavins
Affiliation:
University of California, Davis, CA 95616
R. N. Shelton
Affiliation:
University of California, Davis, CA 95616
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Abstract

The time-dependent magnetic relaxation was measured in a full field penetrated YBa2Cu3O7-δ detwinned crystal for long times up to 5×105 sec. The relaxation data exhibit a power-law time dependence over a wide range of temperatures and magnetic fields indicative of flux creep with logarithmic dependence of the effective creep activation barrier U(J). A theoretical model is employed to analyze the data and to determine the activation energy.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 275: Symposium S – Layered Superconductors: Fabrication, Properties and Applications , 1992 , 867
Copyright
Copyright © Materials Research Society 1992

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References

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