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

"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."

Name thesis:degree_name

Ph.D.

Level thesis:degree_level

Dissertation

Discipline thesis:degree_discipline

Physics

Year dc:date

2011

Author dc:creator

• Ashman, John Ernst

Contributors dc:contributor

• Handler, Paul

• specific heat
• order-disorder transition
• beta-brass
• ising model
• ac calorimetry

Statement dc:rights

• 1970 John Ernst Ashman

Language dc:language

en

Identifier

6059368

OAI identifier oai:identifier

oai:www.ideals.illinois.edu:2142/25842