Abstract
The effect of thermal disturbances and nonsuperconducting defects on the microwave breakdown of a high-temperature superconducting film is investigated theoretically. The dependence of the critical energy of thermal disturbances on the surface microwave field is obtained. It is shown that in a wide range of values of the surface microwave field the critical energy of local disturbances is less than the critical energy of spatially extended disturbances. It is established that microwave breakdown on defects may be preceded by a stage of formation of a finite-size normal-phase region localized at the defect. The effect of the form and absorption coefficient of the defect on scenarios leading to the destruction of superconductivity and on the microwave breakdown field of a film at a defect are investigated.
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Zh. Tekh. Fiz. 69, 52–59 (May 1999)
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Buznikov, N.A., Pukhov, A.A. Microwave breakdown initiated in a high-temperature superconducting film by thermal disturbances and defects. Tech. Phys. 44, 526–532 (1999). https://doi.org/10.1134/1.1259377
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DOI: https://doi.org/10.1134/1.1259377