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Magnetic frustration, short-range correlations and the role of the paramagnetic Fermi surface of PdCrO2

Billington, David, Ernsting, David, Millichamp, Thomas E., Lester, Christopher, Dugdale, Stephen B., Kersh, David, Duffy, Jonathan A., Giblin, Sean, Taylor, Jonathan W., Manuel, Pascal, Khalyavin, Dmitry D. and Takatsu, Hiroshi 2015. Magnetic frustration, short-range correlations and the role of the paramagnetic Fermi surface of PdCrO2. Scientific Reports- Faculty of Agriculture Okayama University 5 , 12428. 10.1038/srep12428

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Abstract

Frustrated interactions exist throughout nature, with examples ranging from protein folding through to frustrated magnetic interactions. Whilst magnetic frustration is observed in numerous electrically insulating systems, in metals it is a rare phenomenon. The interplay of itinerant conduction electrons mediating interactions between localised magnetic moments with strong spin-orbit coupling is likely fundamental to these systems. Therefore, knowledge of the precise shape and topology of the Fermi surface is important in any explanation of the magnetic behaviour. PdCrO2, a frustrated metallic magnet, offers the opportunity to examine the relationship between magnetic frustration, short-range magnetic order and Fermi surface topology. By mapping the short-range order in reciprocal space and experimentally determining the electronic structure, we have identified the dual role played by the Cr electrons in which the itinerant ones on the nested paramagnetic Fermi surface mediate the frustrated magnetic interactions between local moments.

Item Type: Article
Date Type: Publication
Status: Published
Schools: Physics and Astronomy
Subjects: Q Science > QC Physics
Publisher: Okayama University
ISSN: 0474-0254
Date of First Compliant Deposit: 27 March 2017
Date of Acceptance: 26 June 2015
Last Modified: 04 Jun 2017 08:20
URI: http://orca.cf.ac.uk/id/eprint/75979

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