Superconducting transition temperatures of amorphous bismuth alloy films
Shier, John Shouse
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https://hdl.handle.net/2142/25072
Description
Title
Superconducting transition temperatures of amorphous bismuth alloy films
Author(s)
Shier, John Shouse
Issue Date
1966
Doctoral Committee Chair(s)
Ginsberg, D.M.
Department of Study
Physics
Discipline
Physics
Degree Name
Ph.D.
Degree Level
Dissertation
Keyword(s)
superconducting transition temperatures
amorphous bismuth alloy films
superconducting coherence lengths
Language
en
Abstract
Measurements have been made of the critical temperatures T of c
amorphous bismuth alloy films containing lead, thallium, and antimony
in concentrations up to 13 atomic percent. The results indicate that
the shift in T is approximately linear in impurity concentration, as c
expected. The derivative of T with respect to impurity concentration
c
is not simply related to the valence or atomic size of the impurity
atoms. It is suggested that this may have the same cause as the breakdown
of Linde's rule for liquid alloys.
The widths of the transitions of the films into the superconducting
state were extremely small (- 5 millidegrees). This observation
has a direct bearing on our understanding of coherence lengths in
superconductors.
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