Superconducting interlayer coupling of NbN/X (X Ag, CNx) multilayered films

Makoto Nakanishi, Y. Tsuchiya, N. Nakayama, K. Yoshimura, K. Kosuge, S. Nagata, S. Yamaguchi

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

The interlayer coupling of superconducting NbN thin films through metallic Ag and insulating CNx thin films has been investigated from resistivity measurements of [NbN(170 A ̊)/X(t A ̊)]10 (X Ag, CNx) multilayered films. When Ag layer thicknesses are thicker than 150 Åm NbN layers are decoupled and the transition temperatures are nearly equal 8.2 K. The transition transition temperature increases with decreasing Ag layer thickness, obeying Werthamer's theory for the proximity effect. On the other hand, with the increase of CNx layer thickness, the transition temperature is lowered steeply and almost linearly, indicating a coupling mechanism other than the proximity effect.

Original languageEnglish
Pages (from-to)33-38
Number of pages6
JournalPhysica C: Superconductivity and its Applications
Volume253
Issue number1-2
DOIs
Publication statusPublished - Oct 20 1995
Externally publishedYes

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Superconducting films
Superconducting transition temperature
interlayers
Thin films
transition temperature
thin films
electrical resistivity

ASJC Scopus subject areas

  • Energy Engineering and Power Technology
  • Electrical and Electronic Engineering
  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

Cite this

Superconducting interlayer coupling of NbN/X (X Ag, CNx) multilayered films. / Nakanishi, Makoto; Tsuchiya, Y.; Nakayama, N.; Yoshimura, K.; Kosuge, K.; Nagata, S.; Yamaguchi, S.

In: Physica C: Superconductivity and its Applications, Vol. 253, No. 1-2, 20.10.1995, p. 33-38.

Research output: Contribution to journalArticle

Nakanishi, M, Tsuchiya, Y, Nakayama, N, Yoshimura, K, Kosuge, K, Nagata, S & Yamaguchi, S 1995, 'Superconducting interlayer coupling of NbN/X (X Ag, CNx) multilayered films', Physica C: Superconductivity and its Applications, vol. 253, no. 1-2, pp. 33-38. https://doi.org/10.1016/0921-4534(95)00500-5
Nakanishi, Makoto ; Tsuchiya, Y. ; Nakayama, N. ; Yoshimura, K. ; Kosuge, K. ; Nagata, S. ; Yamaguchi, S. / Superconducting interlayer coupling of NbN/X (X Ag, CNx) multilayered films. In: Physica C: Superconductivity and its Applications. 1995 ; Vol. 253, No. 1-2. pp. 33-38.
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