Nernst effect by laser-pulse heating in Tl-Ba-Ca-Cu-O superconducting thin films
- 1 October 1990
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review B
- Vol. 42 (10) , 6264-6267
- https://doi.org/10.1103/physrevb.42.6264
Abstract
The Nernst effect has been observed in a high-temperature superconductor with a laser-pulse-heating method. Irradiating a Tl-Ba-Ca-Cu-O film by a short laser pulse, a voltage signal transverse to an external, surface-parallel magnetic field has been observed. This signal is attributed to vortex depinning and vortex transport driven by the laser-induced temperature gradient. We describe our results by thermal flux tube activation and find a distribution of pinning energies from about 100 to 4000 K.Keywords
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