Abstract
The novel compound Ca 2Co 1.6Ga 0.4O 5 with brownmillerite (BM) structure has been prepared from citrates at 950 °C. The crystal structure of Ca 2Co 1.6Ga 0.4O 5 was refined, from neutron powder diffraction (NPD) data, in space group Pnma , a = 5.3022 ( 6 ) Å , b = 14.884 ( 2 ) Å , c = 5.5276 ( 6 ) Å , χ 2 = 1.798 , R F 2 = 0.0455 , R wp = 0.0378 and R p = 0.0292 . On the basis of the NPD refinement the compound was found to be a G-type antiferromagnet (space group P n ′ m ′ a ) at room temperature, with the magnetic moments of cobalt atoms directed along chains of tetrahedra in the BM structure. Electron diffraction and electron microscopy studies revealed disorder in the crystallites, which can be interpreted as the presence of slabs with BM-type structure of Pnma and I 2 mb symmetry.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
