Proximity effect in iridium-gold bilayers

U. Nagel, A. Nowak, H. J. Gebauer, P. Colling, S. Cooper, D. Dummer, P. Ferger, Matthias Frank, J. Igalson, A. Nucciotti, F. Pröbst, W. Seidel, E. Kellner, F. V. Feilitzsch, G. Forster

Research output: Contribution to journalArticle

26 Citations (Scopus)

Abstract

We have studied the proximity effect in bilayers of thin films of iridium covered by gold. By varying the thicknesses of the iridium and gold layers, we achieved critical temperatures as low as 33 mK. The critical temperature of the bilayers is lower than predicted by the theory of de Gennes-Werthamer [J. J. Hauser, H. C. Treuerer, and N. R. Werthamer, Phys. Rev. 136, A637 (1964)], but adding a free parameter to the theory allows good agreement. The transitions of the bilayers typically had widths of a few mK, with the narrowest reaching 0.2 mK, and were always steeper than those of pure iridium films evaporated simultaneously. Such bilayers can be used as superconducting phase transition thermometers in cryogenic particle detectors.

Original languageEnglish (US)
Pages (from-to)4262-4266
Number of pages5
JournalJournal of Applied Physics
Volume76
Issue number7
DOIs
StatePublished - Dec 1 1994
Externally publishedYes

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iridium
gold
critical temperature
radiation counters
thermometers
cryogenics
thin films

ASJC Scopus subject areas

  • Physics and Astronomy(all)

Cite this

Nagel, U., Nowak, A., Gebauer, H. J., Colling, P., Cooper, S., Dummer, D., ... Forster, G. (1994). Proximity effect in iridium-gold bilayers. Journal of Applied Physics, 76(7), 4262-4266. https://doi.org/10.1063/1.357310

Proximity effect in iridium-gold bilayers. / Nagel, U.; Nowak, A.; Gebauer, H. J.; Colling, P.; Cooper, S.; Dummer, D.; Ferger, P.; Frank, Matthias; Igalson, J.; Nucciotti, A.; Pröbst, F.; Seidel, W.; Kellner, E.; Feilitzsch, F. V.; Forster, G.

In: Journal of Applied Physics, Vol. 76, No. 7, 01.12.1994, p. 4262-4266.

Research output: Contribution to journalArticle

Nagel, U, Nowak, A, Gebauer, HJ, Colling, P, Cooper, S, Dummer, D, Ferger, P, Frank, M, Igalson, J, Nucciotti, A, Pröbst, F, Seidel, W, Kellner, E, Feilitzsch, FV & Forster, G 1994, 'Proximity effect in iridium-gold bilayers', Journal of Applied Physics, vol. 76, no. 7, pp. 4262-4266. https://doi.org/10.1063/1.357310
Nagel U, Nowak A, Gebauer HJ, Colling P, Cooper S, Dummer D et al. Proximity effect in iridium-gold bilayers. Journal of Applied Physics. 1994 Dec 1;76(7):4262-4266. https://doi.org/10.1063/1.357310
Nagel, U. ; Nowak, A. ; Gebauer, H. J. ; Colling, P. ; Cooper, S. ; Dummer, D. ; Ferger, P. ; Frank, Matthias ; Igalson, J. ; Nucciotti, A. ; Pröbst, F. ; Seidel, W. ; Kellner, E. ; Feilitzsch, F. V. ; Forster, G. / Proximity effect in iridium-gold bilayers. In: Journal of Applied Physics. 1994 ; Vol. 76, No. 7. pp. 4262-4266.
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