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Temperature dependence of critical currents of two-gap superconductors

Published online by Cambridge University Press:  08 November 2006

H. Şahin  and
I. N. Askerzade
H. Şahin*
Affiliation:
Department of Physics, Faculty of Science and Literature, Cumhuriyet University, 58140 Sivas, Turkey
I. N. Askerzade
Affiliation:
Department of Physics, Faculty of Sciences, Ankara University, 06100 Tandoğan, Ankara, Turkey and Institute of Physics, Azerbaijan National Academy of Sciences, Baku AZ1143, Azerbaijan
*
hsahin@cumhuriyet.edu.tr
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Abstract

In this paper, we consider the two-gap Ginzburg-Landau (G-L) free energy functional including the interactions, and obtain a very simple and explicit formula which presents the relation between the critical current density and temperature. The result shows that the temperature dependence of critical current density of a two-gap superconductor is of the form J c ∝ (T c * − T)1/2 at low temperatures and J c ∝ (T c * − T)3/2 near the critical temperature. Our critical current density expression is in accord with the previous theoretical work and experimental data.

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Type
Research Article
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The European Physical Journal - Applied Physics , Volume 36 , Issue 3 , December 2006 , pp. 267 - 270
Copyright
© EDP Sciences, 2006

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