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A generalized treatment of the order-disorder transformation in alloys and its effects on their magnetic properties

Citation

Baskes, Michael I. (1970) A generalized treatment of the order-disorder transformation in alloys and its effects on their magnetic properties. Dissertation (Ph.D.), California Institute of Technology. http://resolver.caltech.edu/CaltechTHESIS:09102015-152741604

Abstract

A theory of the order-disorder transformation is developed in complete generality. The general theory is used to calculate long range order parameters, short range order parameters, energy, and phase diagrams for a face centered cubic binary alloy. The theoretical results are compared to the experimental determination of the copper-gold system, Values for the two adjustable parameters are obtained.

An explanation for the behavior of magnetic alloys is developed, Curie temperatures and magnetic moments of the first transition series elements and their alloys in both the ordered and disordered states are predicted. Experimental agreement is excellent in most cases. It is predicted that the state of order can effect the magnetic properties of an alloy to a considerable extent in alloys such as Ni3Mn. The values of the adjustable parameter used to fix the level of the Curie temperature, and the adjustable parameter that expresses the effect of ordering on the Curie temperature are obtained.

Item Type:Thesis (Dissertation (Ph.D.))
Subject Keywords:Materials Science
Degree Grantor:California Institute of Technology
Division:Engineering and Applied Science
Major Option:Materials Science
Thesis Availability:Public (worldwide access)
Research Advisor(s):
  • Buffington, F. S.
Thesis Committee:
  • Unknown, Unknown
Defense Date:12 December 1969
Funders:
Funding AgencyGrant Number
NSFUNSPECIFIED
John and Fannie Hertz FoundationUNSPECIFIED
Record Number:CaltechTHESIS:09102015-152741604
Persistent URL:http://resolver.caltech.edu/CaltechTHESIS:09102015-152741604
Default Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:9147
Collection:CaltechTHESIS
Deposited By: Benjamin Perez
Deposited On:11 Sep 2015 14:16
Last Modified:11 Sep 2015 14:16

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