Low-Tc SQUIDs with a built-in heater module to remove flux trapping

Koichi Yokosawa, Daisuke Suzuki, Keiji Tsukada, Seiichi Ugai, Toshiaki Suzuki, Yasushi Shimizu

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

We have fabricated low-Tc SQUIDs (superconducting quantum interference devices) that have a built-in heater module next to the Josephson junctions to remove trapped flux by using only a low heating power. To suppress the generation of magnetic fields, the heater module comprises a double-layer consisting of a heater, which is a narrow Nb film, and an Al electrode. The module can be fabricated together with the SQUID without complicating the process. The Nb heater is transformed to normal metal with sufficient resistance when a current above the critical current flows through it. We demonstrated that the heater module could reliably remove trapped flux with 24 mW without increasing any noise of the SQUID or causing re-trapping.

Original languageEnglish
Pages (from-to)1286-1291
Number of pages6
JournalSuperconductor Science and Technology
Volume13
Issue number8
DOIs
Publication statusPublished - Aug 2000
Externally publishedYes

Fingerprint

Flux pinning
SQUIDs
heaters
modules
trapping
interference
Fluxes
Critical currents
Metals
Magnetic fields
Heating
Electrodes
Josephson junctions
critical current
heating
electrodes
magnetic fields
metals

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Physics and Astronomy (miscellaneous)
  • Condensed Matter Physics

Cite this

Low-Tc SQUIDs with a built-in heater module to remove flux trapping. / Yokosawa, Koichi; Suzuki, Daisuke; Tsukada, Keiji; Ugai, Seiichi; Suzuki, Toshiaki; Shimizu, Yasushi.

In: Superconductor Science and Technology, Vol. 13, No. 8, 08.2000, p. 1286-1291.

Research output: Contribution to journalArticle

Yokosawa, Koichi ; Suzuki, Daisuke ; Tsukada, Keiji ; Ugai, Seiichi ; Suzuki, Toshiaki ; Shimizu, Yasushi. / Low-Tc SQUIDs with a built-in heater module to remove flux trapping. In: Superconductor Science and Technology. 2000 ; Vol. 13, No. 8. pp. 1286-1291.
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