Superconductivity of Dilute Indium-Thallium Alloys
Gubser, Donald U.
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https://hdl.handle.net/2142/16513
Description
Title
Superconductivity of Dilute Indium-Thallium Alloys
Author(s)
Gubser, Donald U.
Issue Date
1969-06
Doctoral Committee Chair(s)
Mapother, D.E.
Keyword(s)
Superconductivity
Language
en
Abstract
Critical field measurements on the InTl alloy system covering the concentration range of 0 to 7 percent thallium have
been made. Since indium and thallium have the same number of valence electrons, the InTl alloy system should be free from
valence effects. It is therefore well suited for studying anisotropy induced changes in superconducting properties. The critical
temperatures were determined from an extrapolation of the critical field data near T , and the critical fields at T=O were determined from an extrapolation of the data below 1 0 K. Measurements down to T=0.35 o K were made to enable an accurate determination of y, the temperature coefficient of normal electronic specific heat. No effect on y due to alloying was observed. Changes in the quantities
Tc' Ho/Tc' and dHc/dT)T=Tc are compared to the anisotropy theory of Markowitz and Kadanoff and of Clem. Significant
departures from theoretical predictions are observed.
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