dc.date.accessioned | 2021-12-20T16:10:57Z | |
dc.date.available | 2023-03-18T23:45:51Z | |
dc.date.created | 2021-04-07T09:13:17Z | |
dc.date.issued | 2021 | |
dc.identifier.citation | Fjellvåg, Asbjørn Slagtern Fjellvåg, Øystein Kumar, Susmit Ruud, Amund Sjåstad, Anja Olafsen . Interplay of valence states and magnetic interactions in the perovskite system LaNi1–xRhxO3. Journal of Solid State Chemistry. 2021, 298 | |
dc.identifier.uri | http://hdl.handle.net/10852/89665 | |
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). | |
dc.language | EN | |
dc.rights | Attribution-NonCommercial-NoDerivatives 4.0 International | |
dc.rights.uri | https://creativecommons.org/licenses/by-nc-nd/4.0/ | |
dc.title | Interplay of valence states and magnetic interactions in the perovskite system LaNi1–xRhxO3 | |
dc.type | Journal article | |
dc.creator.author | Fjellvåg, Asbjørn Slagtern | |
dc.creator.author | Fjellvåg, Øystein | |
dc.creator.author | Kumar, Susmit | |
dc.creator.author | Ruud, Amund | |
dc.creator.author | Sjåstad, Anja Olafsen | |
cristin.unitcode | 185,15,17,10 | |
cristin.unitname | Senter for Materialvitenskap og Nanoteknologi kjemi | |
cristin.ispublished | true | |
cristin.fulltext | postprint | |
cristin.qualitycode | 1 | |
dc.identifier.cristin | 1902589 | |
dc.identifier.bibliographiccitation | info:ofi/fmt:kev:mtx:ctx&ctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.jtitle=Journal of Solid State Chemistry&rft.volume=298&rft.spage=&rft.date=2021 | |
dc.identifier.jtitle | Journal of Solid State Chemistry | |
dc.identifier.volume | 298 | |
dc.identifier.pagecount | 7 | |
dc.identifier.doi | https://doi.org/10.1016/j.jssc.2021.122124 | |
dc.identifier.urn | URN:NBN:no-92272 | |
dc.type.document | Tidsskriftartikkel | |
dc.type.peerreviewed | Peer reviewed | |
dc.source.issn | 0022-4596 | |
dc.identifier.fulltext | Fulltext https://www.duo.uio.no/bitstream/handle/10852/89665/2/Paper%2B-%2BLaNi%25281-x%2529Rh%2528x%2529O%25283%2529%2B%25E2%2580%2593%2BRevised.pdf | |
dc.type.version | AcceptedVersion | |
cristin.articleid | 122124 | |
dc.relation.project | NFR/272253 | |
dc.relation.project | NFR/237922 | |