Heat propagation in high T c films investigated by optical response measurements
- 24 August 1992
- journal article
- research article
- Published by AIP Publishing in Applied Physics Letters
- Vol. 61 (8) , 973-975
- https://doi.org/10.1063/1.107745
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 6×10−3 cm2/s at a temperature of 30 K and allows for an estimation of the boundary resistance Rbd≊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.Keywords
This publication has 18 references indexed in Scilit:
- Subnanosecond photoresponse of a YBaCuO thin film to infrared and visible radiation by quasiparticle induced suppression of superconductivityApplied Physics Letters, 1992
- Nonbolometric photoresponse of YBa2Cu3O7−δ filmsApplied Physics Letters, 1991
- Fast bolometric response by high Tc detectors measured with subnanosecond synchrotron radiationApplied Physics Letters, 1990
- Optical response of nongranular high-T c Y1Ba2Cu3O7−x superconducting thin filmsJournal of Applied Physics, 1990
- Nonthermal optical response of Y-Ba-Cu-O thin filmsApplied Physics Letters, 1989
- Interaction of picosecond optical pulses with high T c superconducting filmsApplied Physics Letters, 1989
- Nonlinear optical response of granular Y-Ba-Cu-O filmsPhysical Review B, 1989
- Electrical response of superconducting YBa2Cu3O7−δ to lightApplied Physics Letters, 1989
- Optical detection in thin granular films of Y-Ba-Cu-O at temperatures between 4.2 and 100 KApplied Physics Letters, 1987
- Optical detector using superconducting BaPb0.7Bi0.3O3 thin filmsJournal of Applied Physics, 1986