Superconducting properties of amorphous Nb1-x Nix films

✍ Scribed by Y. Kuwasawa; K. Wazumi; Y. Kamata; T. Watanaba; S. Nakano

• Book ID: 104356409
• Publisher: Elsevier Science
• Year: 1990
• Tongue: English
• Weight: 407 KB
• Volume: 165-166
• Category: Article
• ISSN: 0921-4526
• DOI: 10.1016/s0921-4526(09)80320-7

✦ Synopsis

We have fabricated DOrphous films of Nb,-xNix in a range of 0.15<x<0.8 by vapour quenching IlE!thod, in which they exhibited a negative temperature coefficient of resistivity and a broad X-ray peak around Nb(llO). The unexpected behaviors of Tc and Hc2 (T) for films in 0.3<x<0.6 was observed, where the Tc decreased with an increase of x without a variation of the bare density of state Nb(O) and the Hc2 (T)/Hc2 (0) at low T /Tc indicated the depression propotional to Ni contents. These data might be explained due to the enhancement of spin susceptibility considering the spin fluctuation.