Structural and superconducting properties of Nb-Ti alloy thin films

The structural instability in Ti rich compositions of Nb-Ti alloy system, which leads to various anomalies in the normal and superconducting state properties, has been extensively studied in bulk samples in the past. In this paper we report the formation of thin films of several compositions in the...

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Bibliographic Details
Published in:Bulletin of materials science 1997-07, Vol.20 (4), p.503-507
Main Authors: Mani, Awadhesh, Vaidhyanathan, L S, Hariharan, Y, Janawadkar, M P, Radhakrishnan, T S
Format: Article
Language:English
Subjects:
Alloy systems
Alloys
Composition
Electrical properties
Instability
Magnetic properties
Magnetron sputtering
Niobium base alloys
Stability
Structural stability
Superconductivity
Thin films
Titanium
Titanium base alloys
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Summary:The structural instability in Ti rich compositions of Nb-Ti alloy system, which leads to various anomalies in the normal and superconducting state properties, has been extensively studied in bulk samples in the past. In this paper we report the formation of thin films of several compositions in the Ti rich region of this alloy system by RF magnetron sputtering and investigation of their electrical properties. Compositional analysis of two representative films was carried out by the RBS technique and the compositions agreed to within 2% of the targeted values. The anomalous variations in the electrical properties characteristic of the bulk, which can be ascribed to the structural instability related to the formation of athermal ω-phase, are also observed in thin films.
ISSN:0250-4707
0973-7669
DOI:10.1007/BF02744763