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

Colin M. Pegrum, John C. MacFarlane

Research output: Contribution to journalArticle

2 Citations (Scopus)
59 Downloads (Pure)

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.
Original languageEnglish
Pages (from-to)778-781
Number of pages4
JournalIEEE Transactions on Applied Superconductivity
Volume19
Issue number3
DOIs
Publication statusPublished - 30 Jun 2009

Keywords

  • heterodyning
  • josephson oscillators
  • SQUIDs
  • superconducting devices
  • high temperature superconductors
  • thermal noise

Fingerprint Dive into the research topics of 'Self-induced structure in the current-voltage characteristics of RSQUIDs'. Together they form a unique fingerprint.

  • Cite this