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Current-voltage characteristics of YBa2Cu3O7step-edge junctions on MgO substrates

Authors
Journal
Physica C Superconductivity
0921-4534
Publisher
Elsevier
Publication Date
Identifiers
DOI: 10.1016/s0921-4534(97)01301-4

Abstract

Abstract In this paper, we report the successful fabrication and current-voltage characteristics of the YBa 2Cu 3O 7 step-edge Josephson junctions on MgO substrates. Our junctions were fabricated by patterning the laser deposited YBa 2Cu 3O 7 thin film on MgO substrates with ion-milled steps. Integer Shapiro steps were observed in the I–V characteristics up to 1 THz under 72 GHz external microwave irradiation. We also estimated the effective shunting capacitance from the voltage of the Fiske resonance observed.

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