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Self-induced structure in the current-voltage characteristics of RSQUIDs

Pegrum, Colin and MacFarlane, J.C. (2009) Self-induced structure in the current-voltage characteristics of RSQUIDs. IEEE Transactions on Applied Superconductivity, 19 (3). pp. 778-781. ISSN 1051-8223

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    Abstract

    Resistive two-junction SQUIDs (RSQUIDs) made from high-temperature superconductors are being developed as narrow-linewidth tunable oscillators in the GHz frequency range. We present here the results of numerical simulation of RSQUIDs of this type. These studies have identified conditions where sub-harmonic steps and other features are apparent in the current-voltage characteristics, driven by the internally-generated heterodyne frequency. The behavior is sensitive to the frequency (set by the voltage across the resistive element in the RSQUID), the temperature and also the loop inductance. We have studied the effects of thermal noise on these features. We also assess how these effects might be observed, and consider how they might affect practical applications of high frequency heterodyne RSQUID oscillators.

    Item type: Article
    ID code: 19039
    Keywords: heterodyning, josephson oscillators, SQUIDs, superconducting devices, Physics
    Subjects: Science > Physics
    Department: Faculty of Science > Physics
    Related URLs:
      Depositing user: Strathprints Administrator
      Date Deposited: 01 Jun 2010 11:54
      Last modified: 15 Dec 2013 23:38
      URI: http://strathprints.strath.ac.uk/id/eprint/19039

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