Abstract
We present a study of the temperature dependence of the critical currentJ c of several dc magnetron sputtered thin Y-Ba-Cu-O films on single crystalline SrTiO3, ZrO2 and Al2O3 substrates. Near the critical temperature Tc it is found thatJ c∼(1–T/Tc)n withn=3 for the SrTiO3 and ZrO2 substrates, whilen=1·3 for the Al2O3 substrate. The temperature dependence in our samples approximately agrees with standard theories for weak links or with the Ambegaokar-Baratoff equation.
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Jánoš, Š., Kúš, P. Temperature dependence of the critical current density in Y-Ba-Cu-O thin films. Czech J Phys 40, 335–340 (1990). https://doi.org/10.1007/BF01597758
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DOI: https://doi.org/10.1007/BF01597758