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A study of CsCl type intermediate phases involving rare earth elements

Citation

Chao, Chang-Chih (1965) A study of CsCl type intermediate phases involving rare earth elements. Dissertation (Ph.D.), California Institute of Technology. http://resolver.caltech.edu/CaltechETD:etd-09112002-171500

Abstract

This thesis presents the results of a systematic study of CsCl type phases in binary alloys of rare earth elements with other metals. Thirty-nine new phases of this type have been found. The linear variation of the lattice parameter of CsCl phases with the trivalent ionic radius of the rare earth metal previously established for a limited number of alloys, has been extended to seventy-nine phases. This linear relationship leads to some interesting qualitative arguments on the ionic size of the non-rare earth element in these phases. The electrical resistivities of nineteen CsCl type phases of rare earths with copper, silver and gold were measured between 4.2 [degrees] K and about 260 [degrees] K. With the exception of the yttrium-silver phase, all others exhibited an anomaly in the resistivity-temperature curve which is attributed to an antiferromagnetic transition. This conclusion is confirmed by previously published results of neutron diffraction experiments and magnetic susceptibility measurements. A qualitative interpretation of the resistivity results based on the indirect exchange interaction between the ions of the same type (magnetic or non-magnetic) and between the ions of the different type (magnetic and non-magnetic) is proposed.

Item Type:Thesis (Dissertation (Ph.D.))
Subject Keywords:Engineering and Applied Science
Degree Grantor:California Institute of Technology
Division:Engineering and Applied Science
Major Option:Engineering and Applied Science
Thesis Availability:Public (worldwide access)
Research Advisor(s):
  • Duwez, Pol E.
Thesis Committee:
  • Buffington, Francis Stephan
  • Mossbauer, Rudolf L.
  • Plesset, Milton S.
Defense Date:24 May 1965
Record Number:CaltechETD:etd-09112002-171500
Persistent URL:http://resolver.caltech.edu/CaltechETD:etd-09112002-171500
Default Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:3451
Collection:CaltechTHESIS
Deposited By: Imported from ETD-db
Deposited On:13 Sep 2002
Last Modified:02 Dec 2014 23:20

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