Local lattice disorder in the geometrically frustrated spin-glass pyrochlore Y2Mo2O7

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DOIResolve DOI: http://doi.org/10.1103/PhysRevB.62.R755
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TypeArticle
Journal titlePhysical review. B, Condensed matter and materials physics
Volume62
Issue2
PagesR755R758
AbstractThe geometrically frustrated spin-glass Y2Mo2O7 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, Tl2Mn2O7. 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.
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LanguageEnglish
Peer reviewedNo
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NPARC number12326981
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Record identifier408cb967-2238-4567-8eea-840cefd998c3
Record created2009-09-10
Record modified2016-05-09
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