Controllable superconducting nb long microbridge by low frequency, and its resonant characteristics

Keiji Tsukada, Toshimitsu Morooka

Research output: Contribution to journalArticle

Abstract

A Nb superconducting microbridge is fabricated, 40-fim long, less than 0.25-/un wide and OA-fim thick.Four-terminal measurement of the I-V characteristics reveals hysterisis in the I-V curve.The microbridge has an excess current over its current in its normal state.Frequency resonance appears over the range of a few hundred kiloherz by electromagnetic wave radiation.The I-V characteristics show that critical current 7C is depressed, and as radiation power increases 7Cdecreases.This phenomenon is thought to be due to resonance of quasiparticles in the microbridge, and to resonance restricting the supercurrent.

Original languageEnglish
Pages (from-to)L1536-L1538
JournalJapanese Journal of Applied Physics
Volume31
Issue number11
DOIs
Publication statusPublished - Nov 1992
Externally publishedYes

Keywords

  • Low frequency resonance
  • Microbridge
  • Nb
  • Quasiparticle excitation
  • Submicron structure

ASJC Scopus subject areas

  • Engineering(all)
  • Physics and Astronomy(all)

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