A proximity effect model for superconductivity in titanium-transition metal alloys

✍ Scribed by Y. Hariharan; M. C. Valsakumar; T. S. Radhakrishnan

• Publisher: Springer US
• Year: 1981
• Tongue: English
• Weight: 600 KB
• Volume: 43
• Category: Article
• ISSN: 0022-2291
• DOI: 10.1007/bf00116159

✦ Synopsis

We present a unified model for the variation in superconducting transition temperature Tr of quenched titanium-transition metal alloys with intermediate-temperature aging. Experimental results on Tc and the low-temperature resistivity of fl-quenched Ti-27 at % Nb solid solution, a representative system, measured as a function of annealing are given. It is shown that the enrichment of the matrix in Nb as a result of precipitation of a Ti-rich to phase is too small to be of any consequence in influencing Tc. Our resistivity data give, for the first time, evidence fo r the formation of athermal to phase in this system. In the light of the present investigation a clear picture has emerged for the interpretation of Tc in terms of varying extent of superconducting proximity effect, which is shown to be intimately related to the microstructural evolution. The result is shown to be general, applicable to any Ti-transition metal alloy system.