Intrinsic Josephson junctions in oxygen-deficient YBa2Cu3Q7-δ film deposited on a substrate step

H. B. Wang, J. Chen, T. Tachiki, Y. Mizugaki, K. Nakajima, T. Yamashita

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16 Citations (Scopus)


Using c-axis-oriented oxygen-deficient YBa2Cu3O7-δ film deposited across a low-angle step on a SrTiO3 substrate, we successfully demonstrated intrinsic Josephson effects. In addition to several voltage jumps of large amplitudes (a few millivolts) and remarkable hysteresis on the dc current-voltage curves, we observed upturns on the current-voltage curves under microwave irradiation which appeared at increasingly high voltages with increasing microwave power. We proposed to explain this observation in terms of high-order microwave-induced Shapiro steps.

Original languageEnglish
Pages (from-to)3740-3744
Number of pages5
JournalJournal of Applied Physics
Issue number7
Publication statusPublished - 1999 Apr 1

ASJC Scopus subject areas

  • Physics and Astronomy(all)


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