Parallel upper critical field of niobium/graphite bilayers

Toshiharu Kubo, Yoshiko F. Ohashi, Takeshi Kinoshita

研究成果: Article査読

1 被引用数 (Scopus)

抄録

The influence of the superconducting proximity effect to the upper critical field (HC) in niobium/graphite bilayers was studied and related to the ratio T*C/TCS: T*C and TcCS are the transition temperature of Nb/KG film and that of Nb film respectively. The thickness of niobium (Nb) film was controlled about 40 nm, and that of graphite (kish graphite: KG) film ranged from 120 nm to 140 nm. For making a specimen, Nb was deposited on a KG film and a quartz glass substrate simultaneously, and magnetic field was applied parallel to the Nb/KG interface. HC of Nb/KG film (H*C) lowered from that of Nb film (HCS) at all temperatures within this work, and the value of ΔH C defined as HCS-H*C showed different temperature dependence among samples, depending on whether T*C/TCS1.00 < or ≧ 1.00. This behavior of HC suggests the additional existence of the interference of electrons in the clean KG film.

本文言語English
ページ(範囲)78-82
ページ数5
ジャーナルPhysica C: Superconductivity and its applications
420
3-4
DOI
出版ステータスPublished - 2005 4 1

ASJC Scopus subject areas

  • 電子材料、光学材料、および磁性材料
  • 凝縮系物理学
  • エネルギー工学および電力技術
  • 電子工学および電気工学

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