Crystal structures and magnetic order of La(0.5+delta)A(0.5-delta)Mn(0.5+epsilon)Ru(0.5-epsilon)O(3) (A=Ca,Sr,Ba): Possible orbital glass ferromagnetic state

dc.creatorGranado, E
dc.creatorHuang, Q
dc.creatorLynn, JW
dc.creatorGopalakrishnan, J
dc.creatorRamesha, K
dc.date2004
dc.dateDEC
dc.date2014-11-15T21:27:49Z
dc.date2015-11-26T16:16:04Z
dc.date2014-11-15T21:27:49Z
dc.date2015-11-26T16:16:04Z
dc.date.accessioned2018-03-28T23:01:34Z
dc.date.available2018-03-28T23:01:34Z
dc.identifierPhysical Review B. American Physical Soc, v. 70, n. 21, 2004.
dc.identifier1098-0121
dc.identifierWOS:000226111400078
dc.identifier10.1103/PhysRevB.70.214416
dc.identifierhttp://www.repositorio.unicamp.br/jspui/handle/REPOSIP/57453
dc.identifierhttp://www.repositorio.unicamp.br/handle/REPOSIP/57453
dc.identifierhttp://repositorio.unicamp.br/jspui/handle/REPOSIP/57453
dc.identifier.urihttp://repositorioslatinoamericanos.uchile.cl/handle/2250/1267490
dc.descriptionThe crystallographic and magnetic properties of La(0.5+delta)A(0.5-delta)Mn(0.5+epsilon)Ru(0.5-epsilon)O(3) (A=Ca,Sr,Ba) were investigated by means of neutron powder diffraction. All studied samples show the orthorhombic perovskite crystal structure, space group Pnma, with regular (Mn,Ru)O-6 octahedra and no chemical ordering of the Mn3+ and Ru4+ ions. Ferromagnetic spin structures were observed below T(c)similar to200-250 K, with an average ordered moment of similar to1.8-2.0mu(B)/(Mn,Ru). The observation of long-range ferromagnetism and the absence of orbital ordering are rationalized in terms of a strong Mn-Ru hybridization, which may freeze the orbital degree of freedom and broaden the e(g) valence band, leading to an orbital glass state with carrier-mediated ferromagnetism.
dc.description70
dc.description21
dc.languageen
dc.publisherAmerican Physical Soc
dc.publisherCollege Pk
dc.publisherEUA
dc.relationPhysical Review B
dc.relationPhys. Rev. B
dc.rightsaberto
dc.sourceWeb of Science
dc.subjectDouble Perovskites
dc.subjectOxides
dc.subjectMetallicity
dc.subjectSystem
dc.titleCrystal structures and magnetic order of La(0.5+delta)A(0.5-delta)Mn(0.5+epsilon)Ru(0.5-epsilon)O(3) (A=Ca,Sr,Ba): Possible orbital glass ferromagnetic state
dc.typeArtículos de revistas


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