Evidence for grain boundary substructure in high-Tc superconductor thin films from Josephson photoresponse

Giselher Schneider; T. P. O'Brien; Werner J. Blau; Peter G. Huggard; Wilhelm Prettl

doi:10.1117/12.200987

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9 February 1995 Evidence for grain boundary substructure in high-Tc superconductor thin films from Josephson photoresponse

Giselher Schneider, T. P. O'Brien, Werner J. Blau, Peter G. Huggard, Wilhelm Prettl

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Proceedings Volume 2362, International Conference on Excitonic Processes in Condensed Matter; (1995) https://doi.org/10.1117/12.200987
Event: Excitonic Processes in Condensed Matter: International Conference, 1994, Darwin, Australia

Abstract

The Josephson photoresponse of granular high-T_c superconductor films to pulsed far infrared laser radiation has been investigated in magnetic fields of up to 3T. Its value is strongly influenced by fields less than 50 mT and shows hysteresis here, while no further changes occur for larger fields. It is shown that the field dependence directly yields information about the properties of intergrain weak links. These are found to have a strongly inhomogeneous critical current distribution.

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Giselher Schneider, T. P. O'Brien, Werner J. Blau, Peter G. Huggard, and Wilhelm Prettl "Evidence for grain boundary substructure in high-Tc superconductor thin films from Josephson photoresponse", Proc. SPIE 2362, International Conference on Excitonic Processes in Condensed Matter, (9 February 1995); https://doi.org/10.1117/12.200987

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