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Quasispin Glass in a Geometrically Frustrated Magnet

Author(s): LaForge, Andrew D.; Pulido, Sergio H.; Cava, Robert Joseph; Chan, Benny C.; Ramirez, Arthur P.

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Abstract: The spin glass state in the spinel ZnCr2(1-x)Ga 2xO4 is studied with magnetization and specific heat for x<0.05. The freezing temperature is independent of disorder, despite a two-level-like density of states that varies linearly with x. This relationship implies the energy scale for freezing is independent of disorder, in contrast to mean field theories of spin glass. We suggest that the degrees of freedom are shielded spin vacancies, quasispins, which interact via an emergent long-range force mediated by the frustrated spin background. © 2013 American Physical Society.
Publication Date: Jan-2013
Electronic Publication Date: 4-Jan-2013
Citation: LaForge, A.D., Pulido, S.H., Cava, R.J., Chan, B.C., Ramirez, A.P. (2013). Quasispin Glass in a Geometrically Frustrated Magnet. Physical Review Letters, 110 (1), 10.1103/PhysRevLett.110.017203
DOI: doi:10.1103/PhysRevLett.110.017203
ISSN: 0031-9007
EISSN: 1079-7114
Pages: 110.1:017203-1 - 017203-4
Type of Material: Journal Article
Journal/Proceeding Title: Physical Review Letters
Version: Final published version. Article is made available in OAR by the publisher's permission or policy.
Notes: Physical Review Letters. Volume 110, Issue 1, 4 January 2013, Article number 017203.

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