Large easy-plane anisotropy induced spin reorientation in magnetoelectric materials (Co4−xMnx)Nb2O9

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dc.contributor.authorDeng, GCen_AU
dc.contributor.authorYu, YSen_AU
dc.contributor.authorCao, YMen_AU
dc.contributor.authorFeng, ZJen_AU
dc.contributor.authorRen, Wen_AU
dc.contributor.authorCao, SXen_AU
dc.contributor.authorStuder, AJen_AU
dc.contributor.authorHester, JRen_AU
dc.contributor.authorKareri, Yen_AU
dc.contributor.authorUlrich, Cen_AU
dc.contributor.authorMcIntyre, GJen_AU
dc.date.accessioned2021-12-17T01:58:51Zen_AU
dc.date.available2021-12-17T01:58:51Zen_AU
dc.date.issued2019-03-29en_AU
dc.date.statistics2021-11-30en_AU
dc.description.abstractNeutron powder diffraction experiments were carried out on the magnetoelectric compound series (Co4−xMnx)Nb2O9 (x  =  0, 1, 2, 3, 3.5, 3.9, 3.95 and 4) from base temperature to above their Neel temperatures. Their magnetic structures were analysed by using the irreducible representation analysis and Rietveld refinement method. Similar to Co4Nb2O9, the compounds with x  ⩽  3.9 have noncollinear in-plane magnetic structures (Γ6) with magnetic moments lying purely in the ab plane with certain canting angles. Mn4Nb2O9 has a collinear antiferromagnetic structure (Γ2) with magnetic moments aligning along the c axis. The compound of x  =  3.95 shows two magnetic phases in the magnetization, which was confirmed to have the Γ2 magnetic structure above 60 K and develop a second Γ6 local phase in addition to the main Γ2 phase due to doping. This study indicates 2.5 at% Co2+ doping is sufficient to alter the collinear easy-axis magnetic structure of Mn4Nb2O9 into the noncollinear easy-plane magnetic structure, which is attributed to the large easy-plane anisotropy of Co2+ and relative small Ising-like anisotropy of Mn2+. The doping effects on the Néel temperature and occupancy are also discussed. © 2019 IOP Publishing Ltden_AU
dc.identifier.articlenumber235801en_AU
dc.identifier.citationDeng, G., Yu, Y., Cao, Y., Feng, Z., Ren, W., Cao, S., Studer, A. J., Hester, J. R., Kareri, Y., Ulrich, C., & McIntyre, G. J. (2019). Large easy-plane anisotropy induced spin reorientation in magnetoelectric materials (Co4−xMnx)Nb2O9. Journal of Physics: Condensed Matter, 31(23), 235801. doi:10.1088/1361-648X/ab0da7en_AU
dc.identifier.issn1361-648Xen_AU
dc.identifier.issue23en_AU
dc.identifier.journaltitleJournal of Physics: Condensed Matteren_AU
dc.identifier.urihttps://doi.org/10.1088/1361-648X/ab0da7en_AU
dc.identifier.urihttps://apo.ansto.gov.au/dspace/handle/10238/12532en_AU
dc.identifier.volume31en_AU
dc.language.isoenen_AU
dc.publisherIOP Scienceen_AU
dc.subjectNeutron diffractionen_AU
dc.subjectNeel temperatureen_AU
dc.subjectAnisotropyen_AU
dc.subjectMagnetic momentsen_AU
dc.subjectMagnetizationen_AU
dc.subjectTransition temperatureen_AU
dc.titleLarge easy-plane anisotropy induced spin reorientation in magnetoelectric materials (Co4−xMnx)Nb2O9en_AU
dc.typeJournal Articleen_AU
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