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On the Nature of Flux Transport Noise

  • C. Heiden

Abstract

Vortex motion in superconducting foils can be studied with the experimental setup1 shown schematically in Fig. 1. Fluxons, generated by an external field H perpendicular to the foil, are driven across the sample by means of an externally applied dc current with density J. Each fluxon traveling across the sheet produces a voltage pulse 2–4 between two contacts attached to the sample. Flux flow leads to a sequence of many such pulses generating the total voltage \(\overline{V}\) + δV at the contact pair. The dc voltage is given by the rate y of fluxons passing between the contacts: \(\overline{V}\) = 0 (φ 0 = flux quantum). Measurements of the ac voltage δV give information about the dynamic behavior of vortex motion. A convenient way to analyze δV, which usually has the character of a noise voltage, is to determine its spectral power density S(f).

Keywords

Shot Noise Contact Pair Noise Voltage Flux Transport Flux Flow 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Springer Science+Business Media New York 1974

Authors and Affiliations

  • C. Heiden
    • 1
  1. 1.Institut für Angewandte PhysikUniversität MünsterMünsterGermany

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