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 language | English |
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Pages (from-to) | 11951-11959 |
Number of pages | 9 |
Journal | Physical Review B |
Volume | 44 |
Issue number | 21 |
DOIs | |
State | Published - 1991 |
Externally published | Yes |