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dc.contributor.authorWoodward, P M-
dc.contributor.authorCox, D E-
dc.contributor.authorVogt, T-
dc.contributor.authorRao, C N R-
dc.contributor.authorCheetham, A K-
dc.identifier.citationChemistry Of Materials 11(12), 3528-3538 (1999)en_US
dc.descriptionRestricted Accessen_US
dc.description.abstractHigh-resolution synchrotron X-ray and neutron powder diffraction techniques have been used to investigate the structural and magnetic phase transitions in two polycrystalline samples with nominal composition (Nd0.5Sr0.5)MnO3. The first sample separates into three coexisting macroscopic phases at low temperature: a ferromagnetic (FM) phase, an orbitally ordered antiferromagnetic A-type (AFM-A) phase, and the majority phase, which shows charge, orbital, and antiferromagnetic CE-type (AFM-CE) ordering. The second sample shows a clean transition from the FM state into the AFM-CE state. The unusual behavior of the first sample is associated with a slight excess of Mn4+ and a wider compositional range with respect to the second sample and illustrates the very delicate competition between these three states near a Mn4+:Mn3+ ratio of unity, where both electron delocalization and charge-ordering are known to occur. The charge-ordered structure of Nd0.5Sr0.5MnO3 is reported.en_US
dc.publisherAmerican Chemical Societyen_US
dc.rights© 1999 American Chemical Societyen_US
dc.subjectAntiferromagnetic Metallic Stateen_US
dc.subjectCharge-Ordered Stripesen_US
dc.subjectColossal Magnetoresistanceen_US
dc.subjectPerovskite Manganitesen_US
dc.subjectElectronic Modelsen_US
dc.titleEffect of Compositional Fluctuations on the Phase Transitions in (Nd1/2Sr1/2)MnO3en_US
Appears in Collections:Research Papers (Prof. C.N.R. Rao)

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