Valence state, lattice incorporation, and resulting magnetic properties of Ni in Zn/Co-based magnetic oxides

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MetadadosDescriçãoIdioma
Autor(es): dc.contributorJohannes Kepler Univ Linz-
Autor(es): dc.contributorUniv Oslo-
Autor(es): dc.contributorEuropean Synchrotron Radiat Facil ESRF-
Autor(es): dc.contributorUniversidade Estadual Paulista (UNESP)-
Autor(es): dc.creatorNey, V.-
Autor(es): dc.creatorHenne, B.-
Autor(es): dc.creatorSouza, M. de-
Autor(es): dc.creatorJantsch, W.-
Autor(es): dc.creatorJohansen, K. M.-
Autor(es): dc.creatorWilhelm, F.-
Autor(es): dc.creatorRogalev, A.-
Autor(es): dc.creatorNey, A.-
Data de aceite: dc.date.accessioned2025-08-21T19:12:32Z-
Data de disponibilização: dc.date.available2025-08-21T19:12:32Z-
Data de envio: dc.date.issued2023-07-29-
Data de envio: dc.date.issued2023-07-29-
Data de envio: dc.date.issued2023-01-20-
Fonte completa do material: dc.identifierhttp://dx.doi.org/10.1063/5.0130731-
Fonte completa do material: dc.identifierhttp://hdl.handle.net/11449/245572-
Fonte: dc.identifier.urihttp://educapes.capes.gov.br/handle/11449/245572-
Descrição: dc.descriptionNi incorporation has been studied in a comprehensive range of Zn/Co-based magnetic oxides to elucidate its valence state and lattice incorporation. The resulting structural and magnetic properties of a range of related types of samples are studied in detail. On the one hand, Ni doping is studied in wurtzite ZnO which is either done by in-diffusion of the Ni into bulk ZnO or by reactive magnetron sputtering for Nidoped thin films of ZnO. The latter is complemented by Ni and Co codoping of ZnO leading to altered magnetic properties which are then dominated by Co. On the other hand, the ZnCo2O4 spinel is codoped with varying amounts of Ni. In the wurtzite oxides, Ni is exclusively found on tetrahedral lattice sites in its formal 2+ oxidation state as deep donor. It behaves as an anisotropic paramagnet, and a limited solubility of Ni below 10% is found. Furthermore, the partial compensation of the antiferromagnetically coupled Co magnetic moments is induced by the Ni due to its smaller magnetic moment. In the ZnCo2O4 spinel, Ni is found to be incorporated in its formal 3+ oxidation state on octahedral sites and also couples antiferromagnetically to the Co moments. At low Ni concentrations, this leads to a lifting of the partial magnetic compensation of the antiferromagnetic ZnCo2O4 spinel and to ferrimagnetism at higher Ni concentrations. Increasing the Ni concentration even further leads to phase separation of cubic NiO resulting in a structurally less defined, exchange-biased composite magnetic oxide.-
Descrição: dc.descriptionAustrian Science Fund (FWF)-
Descrição: dc.descriptionResearch Council of Norway-
Descrição: dc.descriptionJohannes Kepler Univ Linz, Inst Halbleiter & Festkorperphys, Altenberger Str 69, A-4040 Linz, Austria-
Descrição: dc.descriptionUniv Oslo, Ctr Mat Sci & Nanotechnol, Dept Phys, N-0316 Oslo, Norway-
Descrição: dc.descriptionEuropean Synchrotron Radiat Facil ESRF, CS 40220, F-38043 Grenoble, France-
Descrição: dc.descriptionUnesp Univ Estadual Paulista, Dept Fis, IGCE, BR-13506900 Rio Claro, SP, Brazil-
Descrição: dc.descriptionUnesp Univ Estadual Paulista, Dept Fis, IGCE, BR-13506900 Rio Claro, SP, Brazil-
Descrição: dc.descriptionAustrian Science Fund (FWF): P26164-N20-
Descrição: dc.descriptionResearch Council of Norway: 295864-
Descrição: dc.descriptionResearch Council of Norway: 314017-
Formato: dc.format21-
Idioma: dc.languageen-
Publicador: dc.publisherAip Publishing-
Relação: dc.relationJournal Of Applied Physics-
???dc.source???: dc.sourceWeb of Science-
Título: dc.titleValence state, lattice incorporation, and resulting magnetic properties of Ni in Zn/Co-based magnetic oxides-
Tipo de arquivo: dc.typelivro digital-
Aparece nas coleções:Repositório Institucional - Unesp

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