Flux trapping in Josephson tunnel junctions

N. Uchida, Keiji Enpuku, Y. Matsugaki, S. Tomita, F. Irie, K. Yoshida

Research output: Contribution to journalArticle

18 Citations (Scopus)

Abstract

Effects of flux trapping in the electrodes of Josephson tunnel junctions on junction characteristics are studied experimentally in the case of the field-cooling process. The suppression of the critical current and the increase of the quasiparticle current of the junction due to the trapped flux are measured. From the increase of the quasiparticle current, the amount of the flux trapped in junction electrodes is evaluated. The obtained amount of the trapped flux is discussed quantitatively on the basis of the pinning theory of nonideal type-II superconductors, which gives the parameter of the electrodes characterizing the flux trapping. The relation between the amount of the suppression of the critical current and that of the trapped flux estimated from the quasiparticle current is studied quantitatively. It is shown that each trapped flux quantum suppresses the critical current of the junction by the ratio of about π(6λL)2/A, where λL is the London penetration depth and A is the junction area.

Original languageEnglish
Pages (from-to)5287-5292
Number of pages6
JournalJournal of Applied Physics
Volume54
Issue number9
DOIs
Publication statusPublished - Dec 1 1983

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tunnel junctions
trapping
critical current
electrodes
retarding
penetration
cooling

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

Cite this

Uchida, N., Enpuku, K., Matsugaki, Y., Tomita, S., Irie, F., & Yoshida, K. (1983). Flux trapping in Josephson tunnel junctions. Journal of Applied Physics, 54(9), 5287-5292. https://doi.org/10.1063/1.332704

Flux trapping in Josephson tunnel junctions. / Uchida, N.; Enpuku, Keiji; Matsugaki, Y.; Tomita, S.; Irie, F.; Yoshida, K.

In: Journal of Applied Physics, Vol. 54, No. 9, 01.12.1983, p. 5287-5292.

Research output: Contribution to journalArticle

Uchida, N, Enpuku, K, Matsugaki, Y, Tomita, S, Irie, F & Yoshida, K 1983, 'Flux trapping in Josephson tunnel junctions', Journal of Applied Physics, vol. 54, no. 9, pp. 5287-5292. https://doi.org/10.1063/1.332704
Uchida N, Enpuku K, Matsugaki Y, Tomita S, Irie F, Yoshida K. Flux trapping in Josephson tunnel junctions. Journal of Applied Physics. 1983 Dec 1;54(9):5287-5292. https://doi.org/10.1063/1.332704
Uchida, N. ; Enpuku, Keiji ; Matsugaki, Y. ; Tomita, S. ; Irie, F. ; Yoshida, K. / Flux trapping in Josephson tunnel junctions. In: Journal of Applied Physics. 1983 ; Vol. 54, No. 9. pp. 5287-5292.
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