Transport entropy in YBa2Cu3O7: A comparison between epitaxial and polycrystalline thin films

F. Kober, H. C. Ri, R. Gross, D. Koelle, R. P. Huebener, A. Gupta

Research output: Contribution to journalArticlepeer-review

32 Scopus citations

Abstract

The dissipative behavior in thin films of YBa2Cu3O7- has been investigated under the influence of a temperature gradient. By using the sample configuration itself as a thermometer, a method has been developed for the study of flux dynamics in the presence of a temperature gradient. The temperature and magnetic-field dependence of the transport entropy was measured, and the influence of grain boundaries on this quantity was investigated. For an epitaxial YBa2Cu3O7- film near Tc, we obtain the value -dHc2/dT=20.5 T/K and the Ginzburg-Landau parameter GL=8010.

Original languageEnglish
Pages (from-to)11951-11959
Number of pages9
JournalPhysical Review B
Volume44
Issue number21
DOIs
StatePublished - 1991
Externally publishedYes

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