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1992

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Si us plau utilitzeu sempre aquest identificador per citar o enllaçar aquest document: https://hdl.handle.net/2445/32225

Cation distribution and magnetization of BaFe12-2xCoxSnxO19 (x=0.9,1.28) single crystals

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http://dx.doi.org/10.1063/1.352359

Resum

The distribution of Sn4+ cations within the five crystallographic sites of the magnetoplumbite (M) ‐like compound BaFe12−2xCoxSnxO19 has been analyzed using single‐crystal x‐ray‐diffraction data. The species Fe3+ and Co2+ cannot be distinguished using x rays because of their very similar atomic numbers; however, the calculation of the apparent valencies for the different sites allows an insight into the Co2+ cation segregation. The use of previous data from neutron powder diffraction allows a precise picture of the cation distribution, which indicates a pronounced site selectivity for both Sn4+ and Co2+ cations. The Sn4+ cations prefer the 4f2 sites and to a much lower extent the 12k sites, while they do not enter the octahedral 2a sites at all. Co2+ cations are distributed among tetrahedral and octahedral sites displaying a clear preference for the tetrahedral 4f1 sites. Magnetic measurements indicate that the compound still exhibits uniaxial anisotropy with the easy direction parallel to the c axis. Nevertheless, the magnetic structure shows a considerable degree of noncolinearity. A strong reduction of the magnetic anisotropy regarding that of the undoped compound is also detected.

Matèries

Materials, Propietats magnètiques, Estructura cristal·lina (Sòlids)

Matèries (anglès)

Materials, Magnetic properties, Layer structure (Solids)

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Col·leccions

Articles publicats en revistes (Mineralogia, Petrologia i Geologia Aplicada)
Articles publicats en revistes (Física de la Matèria Condensada)

Citació

SANDIUMENGE ORTIZ, Felip, et al. Cation distribution and magnetization of BaFe12-2xCoxSnxO19 (x=0.9,1.28) single crystals. Journal of Applied Physics. 1992. Vol. 72, num. 10, pags. 4608-4614. ISSN 0021-8979. [consulted: 18 of August of 2026]. Available at: https://hdl.handle.net/2445/32225

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