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The Change of the Vibration Entropy Due to the Disordering of an Ordered Simple-Cubic Alloy

Published online by Cambridge University Press:  21 February 2011

A.A.H.J. Waegmaekers
Affiliation:
Natuurkundig Laboratorium der Universiteit van Amsterdam, Valckenierstraat 65, 1018 XE Amsterdam, The Netherlands
H. Bakker
Affiliation:
Natuurkundig Laboratorium der Universiteit van Amsterdam, Valckenierstraat 65, 1018 XE Amsterdam, The Netherlands
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Abstract

Within a model of central and noncentral forces the exact change of the vibrational entropy, ΔS, is calculated, both as function of the degree of order and as a function of the diverse force constants. A linear relationship between ΔS and the short-range order parameter is found. Results of ΔS as a function of the force constants are compared with ΔS as calculated by an empirical formula based on a modified Einstein crystal model.

Type
Research Article
Copyright
Copyright © Materials Research Society 1984

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References

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