Theory of the Amplitude of the de Haas-van Alphen Oscillation in the Superconducting Mixed State: Effects of the Eddy Currents

Tomomi Kikuta, Yukihiro Shimizu

Research output: Contribution to journalArticlepeer-review

Abstract

The amplitude of the de Haas-van Alphen (dHvA) oscillation in the superconducting mixed state, which is measured by the field modulation method, is calculated. We investigate the effects of the superconducting eddy currents on the voltage signal from a pick-up coil, assuming that a finite conductivity, which may originate from the flux flow for example, exists in the mixed state. In a material which has a small Fermi surface, the Shubnikov-de Haas (SdH) effect contributes to the voltage signal in addition to the dHvA effect; therefore the amplitude of the voltage becomes larger than that of only the dHvA effect. In a material which has a large Fermi surface, the amplitude is hardly affected by the SdH effect and becomes smaller due to the skin effect. The present results have the same tendency with the experimental data of NbSe2 as an example of a small Fermi surface and V3Si as an example of a large Fermi surface.

Original languageEnglish
Pages (from-to)2520-2525
Number of pages6
Journaljournal of the physical society of japan
Volume71
Issue number10
DOIs
Publication statusPublished - 2002 Oct 1

Keywords

  • De Haas-van Alphen effect
  • Eddy currents
  • Field modulation method
  • Superconductor

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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