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

Pegrum, Colin M. and MacFarlane, John 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 (https://doi.org/10.1109/TASC.2009.2019591)

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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.

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• Item metadata

  Item type:	Article
  ID code:	19039
  Dates:	Date Event 30 June 2009 Published
  Subjects:	Science > Physics
  Department:	Faculty of Science > Physics
  Depositing user:	Strathprints Administrator
  Date deposited:	01 Jun 2010 10:54
  Last modified:	08 Apr 2024 17:52
  URI:	https://strathprints.strath.ac.uk/id/eprint/19039