Critical current as a function of temperature in thin YBa2Cu3O7−δ films
- 1 July 1988
- journal article
- letter
- Published by AIP Publishing in Journal of Applied Physics
- Vol. 64 (1) , 426-429
- https://doi.org/10.1063/1.341209
Abstract
The critical current Ic of several triode‐sputtered and laser‐ablated thin YBa2Cu3O7−δ films is investigated over the temperature range of 5–85 K. Near the critical temperature Tc it is found that Ic∝(1−T/Tc)γ with γ≂1.5–2. The value of γ depends very sensitively on the value determined for Tc. The low‐temperature data, for temperatures below about 0.6Tc, can be well analyzed in terms of a proximity‐effect model. The effective barrier thickness dN between superconducting parts of the samples is of the order of a few nanometers for all samples studied.This publication has 9 references indexed in Scilit:
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