Magnetic relaxation and critical current in an YBaCuO crystal

Y. Yeshurun; A. P. Malozemoff; F. Holtzberg

doi:10.1063/1.342208

Magnetic relaxation and critical current in an YBaCuO crystal

Y. Yeshurun, A. P. Malozemoff, F. Holtzberg

IBM

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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.

Original language	English
Pages (from-to)	5797-5799
Number of pages	3
Journal	Journal of Applied Physics
Volume	64
Issue number	10
DOIs	https://doi.org/10.1063/1.342208
State	Published - 1988
Externally published	Yes

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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.",

author = "Y. Yeshurun and Malozemoff, {A. P.} and F. Holtzberg",

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N2 - 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.

AB - 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.

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Magnetic relaxation and critical current in an YBaCuO crystal

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