dc.contributor.author | Fjellvåg, Asbjørn Slagtern | |
dc.contributor.author | Fjellvåg, Øystein | |
dc.contributor.author | Kumar, Susmit | |
dc.contributor.author | Ruud, Amund | |
dc.contributor.author | Sjåstad, Anja Olafsen | |
dc.date.accessioned | 2022-10-18T11:27:59Z | |
dc.date.available | 2022-10-18T11:27:59Z | |
dc.date.created | 2021-04-07T09:13:17Z | |
dc.date.issued | 2021 | |
dc.identifier.citation | Journal of Solid State Chemistry. 2021, 298 . | en_US |
dc.identifier.issn | 0022-4596 | |
dc.identifier.uri | https://hdl.handle.net/11250/3026650 | |
dc.description.abstract | We report on the structural, magnetic and electronic properties of Rh substituted LaNiO3, LaNi1–xRhxO3 (0 ≤ x ≤ 1). Increased Rh contents are associated with increased structural distortion, and we observe a phase transformation and an immiscibility gap between 0.15 ≤ x ≤ 0.25, separating the R-3c and Pnma perovskite structure regimes. Structural evaluation by synchrotron X-ray diffraction, X-ray absorption spectroscopy and DC magnetic measurements suggest variations in oxidation state for the B-site cations, with Ni(II)/Rh(IV), in addition to Rh(III), dominating for high Rh-contents. Although ordering of Ni(II)/Rh(IV) is possible, no B-site ordering between Ni and Rh is observed for any composition. A metal-to-insulator transition occurs upon Rh-substitution, correlating with the structural transition. DC- and AC magnetic measurements reveal that several of the compositions are magnetically frustrated with both antiferro- and ferromagnetic behaviour at low temperatures. The antiferromagnetic interactions are dominating, while the ferromagnetic interactions increase with increasing Rh-content, to a maximum at x = 0.80 and x = 0.90 in LaNi1–xRhxO3. The mixed valence states are assumed to contribute with a ferromagnetic super-exchange interaction between Ni(II) and Rh(IV). | en_US |
dc.language.iso | eng | en_US |
dc.rights | Attribution-NonCommercial-NoDerivatives 4.0 Internasjonal | * |
dc.rights | Attribution-NonCommercial-NoDerivatives 4.0 Internasjonal | * |
dc.rights | Attribution-NonCommercial-NoDerivatives 4.0 Internasjonal | * |
dc.rights | Attribution-NonCommercial-NoDerivatives 4.0 Internasjonal | * |
dc.rights.uri | http://creativecommons.org/licenses/by-nc-nd/4.0/deed.no | * |
dc.title | Interplay of valence states and magnetic interactions in the perovskite system LaNi1–xRhxO3 | en_US |
dc.type | Peer reviewed | en_US |
dc.type | Journal article | en_US |
dc.description.version | acceptedVersion | en_US |
dc.source.pagenumber | 7 | en_US |
dc.source.volume | 298 | en_US |
dc.source.journal | Journal of Solid State Chemistry | en_US |
dc.identifier.doi | 10.1016/j.jssc.2021.122124 | |
dc.identifier.cristin | 1902589 | |
dc.relation.project | Norges forskningsråd: 272253 | en_US |
dc.relation.project | Norges forskningsråd: 237922 | en_US |
cristin.ispublished | true | |
cristin.fulltext | postprint | |
cristin.qualitycode | 1 | |