Crystal and Magnetic Structure in Co-Substituted BiFeO3
Inorganic Chemistry2013Vol. 52(22), pp. 13269–13277
Citations Over TimeTop 10% of 2013 papers
I. Sosnowska, Masaki Azuma, R. Przeniosło, Dariusz Wardecki, Wei‐Tin Chen, Kengo Oka, Yuichi Shimakawa
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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