Local lattice disorder in the geometrically frustrated spin-glass pyrochlore

C. Booth, J. Gardner, G. Kwei, R. Heffner, F. Bridges, M. Subramanian

Research output: Contribution to journalArticlepeer-review

95 Scopus citations

Abstract

The geometrically frustrated spin-glass (Formula presented) has been widely considered to be crystallographically ordered with a unique nearest-neighbor magnetic exchange interaction, J. To test this assertion, we present x-ray-absorption fine-structure results for the Mo and Y K edges as a function of temperature and compare them to results from a well-ordered pyrochlore, (Formula presented) We find that the Mo-Mo pair distances are significantly disordered at approximately right angles to the Y-Mo pairs. These results strongly suggest that lattice disorder nucleates the spin-glass phase in this material.

Original languageEnglish
Pages (from-to)R755-R758
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume62
Issue number2
DOIs
StatePublished - 2000
Externally publishedYes

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