Doping induced magnetic clusters and Co spin state transition in Na_xCoO_2 with 0.78<x<.97

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dc.creatorBernhard, C.
dc.creatorNiedermayer, Ch.
dc.creatorDrew, A.
dc.creatorKhaliullin, G.
dc.creatorBayrakci, S.
dc.creatorStrempfer, J.
dc.creatorKremer, R. K.
dc.creatorChen, D. P.
dc.creatorLin, C. T.
dc.creatorKeimer, B.
dc.date2007-01-02
dc.date2007-10-04
dc.date.accessioned2026-07-07T08:34:00Z
dc.date.available2026-07-07T08:34:00Z
dc.descriptionBy muon spin rotation we investigated the magnetic properties of a series of highly Na doped NaxCoO2 single crystals with 0.78(1)<x<0.97(1). Our data provide evidence for an intrinsically inhomogeneous magnetic state which can be described in tems of hole doping (Na vacancy) induced magnetic clusters that percolate at 1-x>0.04 until they yield a bulk magnetic state near x=0.78. Evidence for a strong (likely geometrical) frustration of the magnetic order is obtained from the anomalous doping dependence of the spin fluctuation rate (above the ordering temperature) which is strongly enhanced at x=0.78 as compared to x=0.97.
dc.description4 figures
dc.identifierhttps://arxiv.org/abs/cond-mat/0701033
dc.identifierhttp://arxiv.org/abs/cond-mat/0701033
dc.identifierEPL 80, 27005 (2007)
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/139286
dc.subjectSuperconductivity
dc.subjectStrongly Correlated Electrons
dc.titleDoping induced magnetic clusters and Co spin state transition in Na_xCoO_2 with 0.78<x<.97
dc.typetext

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