Spatial Spin-Modulated Structure of Bi1 –xSrxFeO3 –y (x = 0, 0.05, and 0.10) Multiferroics

The room-temperature X-ray and Mössbauer data on the BiFeO 3 , Bi 0.95 Sr 0.05 FeO 3 – y , and Bi 0.90 Sr 0.10 FeO 3 – y multiferroics obtained by solid-phase synthesis are presented. The samples have a rhombohedral crystal structure with the sp. gr. R 3 c . The lattice parameter a h is invariable,...

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Bibliographic Details
Published in:Crystallography reports 2023-10, Vol.68 (5), p.779-787
Main Authors: Pokatilov, V. S., Rusakov, V. S., Gapochka, A. M., Sigov, A. S.
Format: Article
Language:English
Subjects:
Anharmonicity
Crystal lattices
Crystal structure
Crystallography and Scattering Methods
Cycloids
Magnetic anisotropy
Mossbauer spectroscopy
Multiferroic materials
Parameters
Physical Properties of Crystals
Physics
Physics and Astronomy
Room temperature
Solid phase synthesis
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Summary:The room-temperature X-ray and Mössbauer data on the BiFeO 3 , Bi 0.95 Sr 0.05 FeO 3 – y , and Bi 0.90 Sr 0.10 FeO 3 – y multiferroics obtained by solid-phase synthesis are presented. The samples have a rhombohedral crystal structure with the sp. gr. R 3 c . The lattice parameter a h is invariable, while the parameter c h decreases with increasing strontium content. The 57 Fe Mössbauer spectra recorded at a temperature of 295 K have been interpreted within the cycloid spatial spin-modulated structure model. It has been established that the easy-axis magnetic anisotropy is implemented in the investigated multiferroics. The anharmonicity parameter m of the spin-modulated structure has been measured. Upon replacement of trivalent Bi 3+ ions in small amounts ( x = 0–0.10) with divalent Sr 2+ ions, the parameter m increases by a factor of more than 3: from 0.10(4) at x = 0.00 to 0.36(10) at x = 0.10.
ISSN:1063-7745
1562-689X
DOI:10.1134/S1063774523600655