Carregant...
Fitxers
Tipus de document
ArticleVersió
Versió publicadaData de publicació
Tots els drets reservats
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
Títol de la revista
Director/Tutor
ISSN de la revista
Títol del volum
Recurs relacionat
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 (anglès)
Citació
Citació
SANDIUMENGE ORTIZ, Felip, MARTÍNEZ PEREA, Benjamin, BATLLE GELABERT, Xavier, GALÍ MEDINA, Salvador, OBRADORS, Xavier. Cation distribution and magnetization of BaFe12-2xCoxSnxO19 (x=0.9,1.28) single crystals. _Journal of Applied Physics_. 1992. Vol. 72, núm. 10, pàgs. 4608-4614. [consulta: 23 de gener de 2026]. ISSN: 0021-8979. [Disponible a: https://hdl.handle.net/2445/32225]