University of Illinois Urbana-Champaign

Far infrared absorption in superconducting niobium alloys

Cappelletti, Ronald Louis

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https://hdl.handle.net/2142/23991

Description

Title
Far infrared absorption in superconducting niobium alloys
Author(s)
Cappelletti, Ronald Louis
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)
  • far infrared absorption
  • superconducting niobium alloys
  • transition metal binary alloys
Language
en
Abstract
The widths of the energy gaps in bulk samples of transition metal binary alloys of the system Zr - Nb - Mo have been measured by the absorption of far-infrared radiation. The gap edges are sharp and there is no notable structure on the curves. No ,attempt was made to compare the shapes of the curves with theory, since certain parameters required for the theoretical calculation were not known. The behavior of the widths of the gaps with alloying follows qualitatively that of the transition temperatures, but the reduced gap widths in two cases are Significantly different from the BCS value of 3.52. The relation between the calculated BCS interaction parameter V and the reduced gap width is found to be opposite to that in the simple metals. Results of this and other experiments can be taken to indicate that the interaction parameter V increases by a factor of about four over this alloy series.
Type of Resource
text
Permalink
http://hdl.handle.net/2142/23991
Copyright and License Information
1966 Ronald Louis Cappelletti

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