HEAT PROPAGATION IN HIGH-TC FILMS INVESTIGATED BY OPTICAL-RESPONSE MEASUREMENTS

ZEUNER, S and LENGFELLNER, H and BETZ, J and RENK, KF and PRETTL, W (1992) HEAT PROPAGATION IN HIGH-TC FILMS INVESTIGATED BY OPTICAL-RESPONSE MEASUREMENTS. APPLIED PHYSICS LETTERS, 61 (8). pp. 973-975. ISSN 0003-6951,

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Abstract

The optical response of granular Tl-Ba-Ca-Cu-O films has been used to investigate thermal properties of the films. An analysis of the response using a heat transfer model yields a thermal diffusivity D = 10(-3) cm2/s at 150 K which rises to 6 X 10(-3) cm2/s at a temperature of 30 K and allows for an estimation of the boundary resistance R(bd) almost-equal-to 10(-3) K cm2/W between film and substrate. The dependence of the response time on film thickness obtained from the heat transfer model is compared with published data indicating that in many experiments the observed response is mainly bolometric in origin.

Item Type: Article
Uncontrolled Keywords: BA-CU-O; THIN-FILMS; YBA2CU3O7-DELTA FILMS;
Depositing User: Dr. Gernot Deinzer
Last Modified: 19 Oct 2022 08:44
URI: https://pred.uni-regensburg.de/id/eprint/54420

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