Magnetic and transport properties of the spin-state disordered oxide La0.8Sr0.2Co1-xRhxO3-[delta]

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dc.contributor Aalto-yliopisto fi
dc.contributor Aalto University en
dc.contributor.author Shibasaki, Soichiro
dc.contributor.author Terasaki, Ichiro
dc.contributor.author Nishibori, Eiji
dc.contributor.author Sawa, Hiroshi
dc.contributor.author Lybeck, Jenni
dc.contributor.author Yamauchi, Hisao
dc.contributor.author Karppinen, Maarit
dc.date.accessioned 2015-10-06T09:01:52Z
dc.date.available 2015-10-06T09:01:52Z
dc.date.issued 2011
dc.identifier.citation Shibasaki, Soichiro & Terasaki, Ichiro & Nishibori, Eiji & Sawa, Hiroshi & Lybeck, Jenni & Yamauchi, Hisao & Karppinen, Maarit. 2011. Magnetic and transport properties of the spin-state disordered oxide La0.8Sr0.2Co1-xRhxO3-[delta]. Physical Review B. Volume 83, Issue 9. 094405/1-7. ISSN 1550-235X (electronic). DOI: 10.1103/physrevb.83.094405. en
dc.identifier.issn 1550-235X (electronic)
dc.identifier.uri https://aaltodoc.aalto.fi/handle/123456789/17946
dc.description.abstract We report measurements and analysis of magnetization, resistivity, and thermopower of polycrystalline samples of the perovskite-type Co/Rh oxide La0.8Sr0.2Co1-xRhxO3-[delta]. This system constitutes a solid solution for a full range of x, in which the crystal structure changes from rhombohedral to orthorhombic symmetry with increasing Rh content x. The magnetization data reveal that the magnetic ground state immediately changes upon Rh substitution from ferromagnetic to paramagnetic with increasing x near 0.25, which is close to the structural phase boundary. We find that one substituted Rh ion diminishes the saturation moment by 9 μB, which implies that one Rh3+ ion makes a few magnetic Co3+ ions nonmagnetic (the low-spin state) and causes disorder in the spin state and the highest occupied orbital. In this disordered composition (0.05⩽x⩽0.75), we find that the thermopower is anomalously enhanced below 50 K. In particular, the thermopower of x=0.5 is larger by a factor of 10 than those of x=0 and 1, and the temperature coefficient reaches 4 μV/K2, which is as large as that of heavy-fermion materials such as CeRu2Si2. en
dc.format.extent 094405/1-7
dc.format.mimetype application/pdf en
dc.language.iso en en
dc.publisher American Physical Society (APS) en
dc.relation.ispartofseries Physical Review B en
dc.relation.ispartofseries Volume 83, Issue 9
dc.rights © 2011 American Physical Society (APS). This is the accepted version of the following article: Shibasaki, Soichiro & Terasaki, Ichiro & Nishibori, Eiji & Sawa, Hiroshi & Lybeck, Jenni & Yamauchi, Hisao & Karppinen, Maarit. 2011. Magnetic and transport properties of the spin-state disordered oxide La0.8Sr0.2Co1-xRhxO3-[delta]. Physical Review B. Volume 83, Issue 9. 094405/1-7. ISSN 1550-235X (electronic). DOI: 10.1103/physrevb.83.094405, which has been published in final form at http://journals.aps.org/prb/abstract/10.1103/PhysRevB.83.094405. en
dc.subject.other Chemistry en
dc.subject.other Physics en
dc.title Magnetic and transport properties of the spin-state disordered oxide La0.8Sr0.2Co1-xRhxO3-[delta] en
dc.type A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä fi
dc.description.version Peer reviewed en
dc.rights.holder American Physical Society (APS)
dc.contributor.school Kemian tekniikan korkeakoulu fi
dc.contributor.school School of Chemical Technology en
dc.contributor.department Kemian laitos fi
dc.contributor.department Department of Chemistry en
dc.subject.keyword perovskite-type Co/Rh oxide en
dc.subject.keyword polycrystalline samples en
dc.subject.keyword thermopower en
dc.subject.keyword resistivity en
dc.subject.keyword magnetization en
dc.identifier.urn URN:NBN:fi:aalto-201510064531
dc.type.dcmitype text en
dc.identifier.doi 10.1103/physrevb.83.094405
dc.type.version Final published version en


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