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2015 ; 5
(ä): 12428
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Magnetic frustration, short-range correlations and the role of the paramagnetic
Fermi surface of PdCrO2
#MMPMID26206589
Billington D
; Ernsting D
; Millichamp TE
; Lester C
; Dugdale SB
; Kersh D
; Duffy JA
; Giblin SR
; Taylor JW
; Manuel P
; Khalyavin DD
; Takatsu H
Sci Rep
2015[Jul]; 5
(ä): 12428
PMID26206589
show ga
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.