Nernst effect by pulsed infrared laser heating in Tl-Ba-Ca-Cu-O high-Tc superconducting films

H. Lengfellner

doi:10.1117/12.2301416

1 December 1990 Nernst effect by pulsed infrared laser heating in Tl-Ba-Ca-Cu-O high-T_c superconducting films

H. Lengfellner

Proceedings Volume 1514, 15th International Conference on Infrared and Millimeter Waves; 151406 (1990) https://doi.org/10.1117/12.2301416
Event: 15th International Conference on Infrared and Millimeter Waves, 1990, Orlando, FL, United States

Abstract

A Nernst effect has been observed by a laser heating method in a Tl-Ba-Ca-Cu-0 superconducting film. The film was irradiated with radiation pulses of a TEA-CO₂ laser inducing a temperature gradient perpendicular to the film surface. In a magnetic field parallel to the film surface a Nernst voltage was observed perpendicular to both the temperature gradient and the magnetic field. We have investigated the Nernst voltage in dependence of sample temperature and magnetic field and find, from an analysis based on thermal activation of flux tubes, a distribution of activation energies ranging from 100 K to 4000 K in our samples.

Citation Download Citation

H. Lengfellner "Nernst effect by pulsed infrared laser heating in Tl-Ba-Ca-Cu-O high-T_c superconducting films", Proc. SPIE 1514, 15th International Conference on Infrared and Millimeter Waves, 151406 (1 December 1990); https://doi.org/10.1117/12.2301416

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