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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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|
|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|
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