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Please use this identifier to cite or link to this item: http://hdl.handle.net/2289/2729
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dc.contributor.authorKumar, N.-
dc.contributor.authorRao, C.N.R.-
dc.date.accessioned2007-06-11T09:51:25Z-
dc.date.available2007-06-11T09:51:25Z-
dc.date.issued1997-03-
dc.identifier.citationJournal of Solid State Chemistry, 1997, Vol.129, p363-366en
dc.identifier.issn0022-4596-
dc.identifier.issn1095-726X (Online)-
dc.identifier.urihttp://hdl.handle.net/2289/2729-
dc.descriptionRestricted Access.en
dc.description.abstractCharge ordering in rare earth manganates of the typeLn0.5A0.5MnO3(Ln=rare earth,A=alkaline earth) is highly sensitive to the average radius of theA-site cations, left angle bracketrAright-pointing angle bracket. In the small left angle bracketrAright-pointing angle bracket regime (e.g., Y0.5Ca0.5MnO3), charge ordering occurs in the paramagnetic state, the transformation to an antiferro-magnetic state occurring at still lower temperatures. At moderate left angle bracketrAright-pointing angle bracket values (e.g., Nd0.5Sr0.5MnO3), a ferromagnetic metallic state transforms to a charge-ordered antiferromagnetic state with cooling. These two distinct types of charge ordering and associated properties are explained in terms of the variation of the exchange couplingsJFMandJAFMwith left angle bracketrAright-pointing angle bracket and the invariance of the single-ion Jahn–Teller energy with left angle bracketrAright-pointing angle bracket. A qualitative temperature–left angle bracketrAright-pointing angle bracket phase diagram, consistent with the experimental observations, has been constructed to describe the properties of the manganates in the different left angle bracketrAright-pointing angle bracket regimes.en
dc.format.extent244853 bytes-
dc.format.mimetypeapplication/pdf-
dc.language.isoenen
dc.publisherElsevier B.V.en
dc.relation.urihttp://dx.doi.org/10.1006/jssc.1997.7351en
dc.rights1997 Elsevier B.V.en
dc.titleThe Nature of Charge Ordering in Rare Earth Manganates and Its Strong Dependence on the Size of the A-Site Cationsen
dc.typeArticleen
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