Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
9841890 | Physica C: Superconductivity and its Applications | 2005 | 5 Pages |
Abstract
The influence of the superconducting proximity effect to the upper critical field (HC) in niobium/graphite bilayers was studied and related to the ratio TCâ/TCS: TCâ and TCS 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 (HCâ) lowered from that of Nb film (HCS) at all temperatures within this work, and the value of ÎHC defined as HCS-HCâ showed different temperature dependence among samples, depending on whether TCâ/TCS1.00 < or â§Â 1.00. This behavior of HC suggests the additional existence of the interference of electrons in the clean KG film.
Related Topics
Physical Sciences and Engineering
Physics and Astronomy
Condensed Matter Physics
Authors
Toshiharu Kubo, Yoshiko F. Ohashi, Takeshi Kinoshita,