Crystal and magnetic structure in co-substituted BiFeO3.
Inorg Chem
; 52(22): 13269-77, 2013 Nov 18.
Article
em En
| MEDLINE
| ID: mdl-24180301
ABSTRACT
Ultra-high-resolution neutron diffraction studies of BiFe(0.8)Co(0.2)O3 show a transition from a cycloidal space modulated spin structure at T = 10 K to a collinear G-type antiferromagnetic structure at T = 120 K. The model of antiparallel directions of Fe(3+) and Co(3+) magnetic moments at the shared Wyckoff position describes well the observed neutron diffraction intensities. On heating above RT, the crystal structure of BiFe(0.8)Co(0.2)O3 changes from a rhombohedral R3c to a monoclinic Cm. At 573 K only the Cm phase is present. The collinear C-type antiferromagnetic structure is present in the Cm phase of BiFe(0.8)Co(0.2)O3 at RT after annealing.
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01-internacional
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MEDLINE
Idioma:
En
Ano de publicação:
2013
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Article