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Title:Low temperature specific heat of Sn and Sn-In alloys
Author(s):Wilkes, William Roy
Doctoral Committee Chair(s):Mapother, D.E.
Department / Program:Physics
Subject(s):low temperature specific heat
tin alloys
adiabatic calorimeter
Abstract:The normal state specific heats of pure tin and alloys consisting of 0.5, 1, 2, 4, and 6 atomic percent indium in tin have been measured between about 0.4 and 4. 2 oK. All of the alloys lie within the solid solubility limit of indium in tin. Measurements were made in an adiabatic calorimeter cooled by a He 3 refrigerator, with the specimens magnetically quenched from the superconducting state. Additional cooling of some specimens was possible by adiabatic magnetization to achieve temperatures as low as 0.24 o K. The results for pure tin are compared with recent data for the temperature coefficient of the norITlal electronic specific heat, tf , and the Debye temperature, r:; . The results for the alloys are interpreted in terms of the variation in '( and &, and comparisons are made with recent determinations of the variations of (f and a with increasing indium concentration. While the variation of e is in reasonable agreement with reported values, the variation of --( with increasing indium content is positive, in disagreement with previously reported data. The results are also discussed in the light of the theories of Markowitz and Kadanoff and of Ginsberg on the variation of the critical temperatures of superconductors with alloying.
Issue Date:1966
Genre:Dissertation / Thesis
Rights Information:1966 William Roy Wilkes
Date Available in IDEALS:2011-05-31
Identifier in Online Catalog:6120825

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