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

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

Research output: Contribution to journalArticlepeer-review

3 Citations (Scopus)


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
Issue number1-2
Publication statusPublished - Oct 20 1995
Externally publishedYes

ASJC Scopus subject areas

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


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