Voltage-current characteristics and the resistive hotspot in thin Y-Ba-Cu-O films

Current-Voltage characteristics (IVC) have been investigated in thin Y-Ba-Cu-O films. The power-low dependence in the lower-voltage regi-on observed in wide temperature 77 K≤T≤92 K and magnetic field H≤5T interval is explained on the basis of the modified Kosterlitz-Thouless (KT) theory for two-dime...

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Bibliographic Details
Published in:Cryogenics (Guildford) 1992, Vol.32, p.592-595
Main Authors: Fix, Alexandr.Sh, Maksimov, Igor L, Morozov, Konstantin V, Osipov, Valery V
Format: Article
Language:English
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Summary:Current-Voltage characteristics (IVC) have been investigated in thin Y-Ba-Cu-O films. The power-low dependence in the lower-voltage regi-on observed in wide temperature 77 K≤T≤92 K and magnetic field H≤5T interval is explained on the basis of the modified Kosterlitz-Thouless (KT) theory for two-dimensional systems. Thermal instability has been observed, switching the superconductor into stable resistive state. The effect of the environment temperature, cooling conditions and the external magnetic field on the behavior of the IVC is explained in the framework of the hotspot theory for superconducting bridges. Direct observation of the resistive hotspot was performed.
ISSN:0011-2275
1879-2235
DOI:10.1016/0011-2275(92)90236-4