Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
8152690 | Journal of Magnetism and Magnetic Materials | 2018 | 30 Pages |
Abstract
The detailed study of magnetic properties, including dc and ac measurements, has been carried out on the Bi-Cr-Sb-O pyrochlore. The region of pyrochlore phase existence was determined and photocatalytic properties have been also studied. We revealed that the Bi-Cr-Sb-O pyrochlore phase occurs along Bi2âxCr1+xSbO7 section within the region xâ¯=â¯0.1-0.4. The Cr3+ ions oxidation state in Bi-Cr-Sb-O pyrochlore was confirmed by XANES spectra. The best Rietveld refinement results for Bi1.8Cr1.2SbO7 composition were achieved for the disordered structure model (space group Fd-3m). According to the magnetic data Bi1.8Cr1.2SbO7 is a highly frustrated pyrochlore with short-range antiferromagnetic exchange interactions between the nearest Cr3+ ions. At Tgâ¯=â¯4 Ð this compound undergoes spin-glass transition.
Related Topics
Physical Sciences and Engineering
Physics and Astronomy
Condensed Matter Physics
Authors
O.G. Ellert, A.V. Egorysheva, O.M. Gajtko, D.I. Kirdyankin, R.D. Svetogorov,