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On the thermal mechanism of microwave breakdown of high-temperature superconducting films

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Abstract

Theoretical arguments supporting the thermal nature of the microwave breakdown of high-temperature superconducting films are compared with experimental data. A comparison of the theoretical and experimental values of the threshold field for breakdown of a uniform film, B f, and the threshold field for breakdown at nonsuperconducting defects, B d, confirms the dependence corresponding to a thermal mechanism: B f, B d∝ (T c-T 0)1/2. It is shown that the space-time picture of the observed breakdown is apparently due to overheating of the film near defects with a size of 10−5–10−6 m. The amplitude of the breakdown field may ultimately be limited by the abrupt decrease in the energy of critical disturbances for the initiation of breakdown.

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Authors and Affiliations

  1. Joint Institute of High Temperatures, Scientific-Research Center of Applied Problems of Electrodynamics, Russian Academy of Sciences, Moscow

    A. A. Pukhov

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  1. A. A. Pukhov
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Pis’ma Zh. Tekh. Fiz. 24, 12–17 (June 12, 1998)

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Pukhov, A.A. On the thermal mechanism of microwave breakdown of high-temperature superconducting films. Tech. Phys. Lett. 24, 417–418 (1998). https://doi.org/10.1134/1.1262138

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  • DOI: https://doi.org/10.1134/1.1262138

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