Sandiumenge Ortiz, FelipMartínez Perea, BenjaminBatlle Gelabert, XavierGalí Medina, Salvador, 1949-Obradors, Xavier2012-10-092012-10-0919920021-8979https://hdl.handle.net/2445/32225The 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.7 p.application/pdfeng(c) American Institute of Physics , 1992MaterialsPropietats magnètiquesEstructura cristal·lina (Sòlids)MaterialsMagnetic propertiesLayer structure (Solids)info:eu-repo/semantics/article0805352012-10-09info:eu-repo/semantics/openAccess