Proximity effect controlled superconducting behavior of novel biphasic Pb-Sn nanoparticles embedded in an Al matrix

Bose, Sangita and Bhattacharya, Victoria and Chattopadhyay, Kamanio and Ayyub, Pushan (2008) Proximity effect controlled superconducting behavior of novel biphasic Pb-Sn nanoparticles embedded in an Al matrix. In: Acta Materialia, 56 (16). pp. 4522-4528.

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Abstract

We report the synthesis of biphasic Pb (46 at.%)-Sn (54 at.%) nanoparticles dispersed in an aluminum matrix and explore the nature of the superconducting transition in these particles. The nanoscaled Pb-Sn alloy particles were dispersed in Al by rapid solidification and the two-phase nature of these particles was characterized by transmission electron imaging, diffraction and composition mapping. A weak superconducting transition occurs at 3.1 K in these alloys, which is much lower than the T-C expected for a Pb46Sn54 alloy or that due to the proximity effect between Pb and Sn. We show that it is the superconducting Al matrix with T-C = 1.2 K that plays a major role in determining the effective transition temperature of the system.

Item Type:	Journal Article
Publication:	Acta Materialia
Publisher:	PERGAMON-ELSEVIER SCIENCE LTD
Additional Information:	Copy right for this article belongs to Acta Materialia Inc
Keywords:	Nanocrystalline materials; Rapid solidification; Aluminum alloys; Superconductor; Proximity
Department/Centre:	Division of Mechanical Sciences > Materials Engineering (formerly Metallurgy)
Date Deposited:	26 Dec 2008 10:57
Last Modified:	19 Sep 2010 04:52
URI:	http://eprints.iisc.ac.in/id/eprint/16428

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