Anomalies in current-voltage characteristics of YBCO/PBCO/YBCO sandwich junctions |
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| Authors: | V. Štrbík Š. Chromik Š. Beňačka M. Bari |
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| Affiliation: | (1) Institute of Electrical Engineering, Slovak Academy of Sciences, 842 39 Bratislava, Slovak Republic;(2) Department of Materials Science & IRC in Superconductivity, University Cambridge, Pembroke street, CB2 3QZ Cambridge, UK |
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| Abstract: | ![]()
The current-voltage characteristics (IVCs) of YBa2Cu3O7−x/PrBa2Cu3O7−x/YBa2Cu3O7−x sandwich junctions of dimensions 14×20 μm2 at the temperatures below 300 K were studied. A few types of pecularities (as sudden junction conductance increase, spreading of resistance, voltage jumps, regions of negative differential resistance, sample voltage polarity change at increasing positive bias current) were observed in IVCs of the sandwich junctions at high bias current (above 15 mA). We found out that all these effects are connected with sample overheating by the bias current and the shape of the temperature dependence of the junction resistance. |
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