University of Illinois Urbana-Champaign

Specific heat of the order-disorder transition in beta-brass and its relation to the Ising Model

Ashman, John Ernst

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https://hdl.handle.net/2142/25842

Description

Title
Specific heat of the order-disorder transition in beta-brass and its relation to the Ising Model
Author(s)
Ashman, John Ernst
Issue Date
1970
Doctoral Committee Chair(s)
Handler, Paul
Department of Study
Physics
Discipline
Physics
Degree Name
Ph.D.
Degree Level
Dissertation
Keyword(s)
  • specific heat
  • order-disorder transition
  • beta-brass
  • ising model
  • ac calorimetry
Language
en
Abstract
"The specific heat Cp of beta-brass near its order-disorder transition has been measured with very high resolution. An ac calorimetry technique was used to make these measurements on ~-brass samples of varying composition. Cv Was then determined from Cp by use of the Pippard relations. The similarity between Cv and various Ising model calculations was found to be quite remarkable. Thus, the possible presence of relatively long-range pairwise interactions has no appreciable effect on the critical behavior of beta-brass's specific heat. The Cv results provide no verification of the ""scaling-law"" prediction a = a'. However, the Cp data do suggest the possibility of a' assuming its true critical behavior only ~ close to the critical temperature Tc. This could then explain why the a = a' equality has been so difficult to confirm experimentally."
Type of Resource
text
Permalink
http://hdl.handle.net/2142/25842
Copyright and License Information
1970 John Ernst Ashman

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Dissertations and Theses - Physics
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Graduate Theses and Dissertations at Illinois