Dissipative flux motion in high-temperature superconductors
作者： T. T. M. Palstra , B. Batlogg , R. B. van Dover , L. F. Schneemeyer , J. V. Waszczak
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摘要: The dissipation below {ital T}{sub c}} has been studied for representatives of all classes cuprate high-temperature superconductors, including Ba{sub 2}YCu{sub 3}O{sub 7{minus}{delta}}, and Bi Tl compounds. results are parametrized in the framework flux creep, with largest activation energies found 7}. It is argued that magnitude dissipative motion more related to electronic anisotropy material than actual defect structure. thermally activated creep model, whose parameters extracted from dc measurements, consistently describes also dynamic irreversibility line melting transition. Finally, similarities behavior emphasized between high-{ital materials, very thin films, layered low-{ital superconductors.
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