Anomalous spin dynamics in charge ordered, 'two-electron' doped manganite Ca_0.9Ce_0.1MnO_3 : consequence of a spin-liquid phase?

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dc.creatorSharma, Ajay
dc.creatorSarangi, Subhasis
dc.creatorBhat, S. V.
dc.date2005-11-08
dc.date.accessioned2026-07-07T06:45:56Z
dc.date.available2026-07-07T06:45:56Z
dc.descriptionThe 'two-electron' doped rare earth mangnites Ca_1-x Ce_x MnO_3 (x = 0.1,0.2) are probed using resistivity, ac susceptibility and electron paramagnetic resonance (EPR) measurements across their respective charge ordering (CO) temperatures T_CO = 173 K and 250 K. The EPR 'g' factor and intensity as well as the transport and magnetic behaviours of the two compositions are qualitatively similar and are as expected for CO systems. However, the EPR linewidth, reflective of the spin dynamics, for x = 0.1, shows a strongly anomalous temperature dependence, decreasing with decreasing temperature below T_CO in contrast with the sample with x = 0.2 and other CO systems. Keeping in view the evidence for magnetic frustration in the system, we propose that the anomalous temperature dependence of the linewidth is the signature of the occurrence of a disorder driven spin liquid phase, present along with charge ordering.
dc.description19 pages including 4 figures
dc.identifierhttps://arxiv.org/abs/cond-mat/0511184
dc.identifierhttp://arxiv.org/abs/cond-mat/0511184
dc.identifierPhys. Rev. B, 73, 035129 (2006)
dc.identifierdoi:10.1103/PhysRevB.73.035129
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/103182
dc.subjectStrongly Correlated Electrons
dc.subjectMaterials Science
dc.titleAnomalous spin dynamics in charge ordered, 'two-electron' doped manganite Ca_0.9Ce_0.1MnO_3 : consequence of a spin-liquid phase?
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