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

IF 0.6 4区材料科学 Q4 CRYSTALLOGRAPHY

Crystallography Reports Pub Date : 2023-12-04 DOI:10.1134/S1063774523600655

V. S. Pokatilov, V. S. Rusakov, A. M. Gapochka, A. S. Sigov

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Abstract

The room-temperature X-ray and Mössbauer data on the BiFeO₃, Bi_0.95Sr_0.05FeO_{3 –} _y, and Bi_0.90Sr_0.10FeO_{3 –} _y multiferroics obtained by solid-phase synthesis are presented. The samples have a rhombohedral crystal structure with the sp. gr. R3c. The lattice parameter a_h is invariable, while the parameter c_h decreases with increasing strontium content. The ⁵⁷Fe 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 Bi³⁺ ions in small amounts (x = 0–0.10) with divalent Sr²⁺ 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.

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Bi1 - xSrxFeO3 - y（x = 0、0.05 和 0.10）多铁材料的空间自旋调制结构

介绍了通过固相合成获得的 BiFeO3、Bi0.95Sr0.05FeO3 - y 和 Bi0.90Sr0.10FeO3 - y 多铁氧体的室温 X 射线和莫斯鲍尔数据。这些样品具有斜方晶体结构，sp.R3c。晶格参数 ah 不变，而参数 ch 则随着锶含量的增加而减小。在 295 K 温度下记录的 57Fe 莫斯鲍尔光谱已在摆线空间自旋调制结构模型中进行了解释。研究证实，所研究的多铁素体具有易轴磁各向异性。测量了自旋调制结构的非谐波参数 m。用二价 Sr2+ 离子替换少量三价 Bi3+ 离子（x = 0-0.10）后，参数 m 增加了 3 倍多：从 x = 0.00 时的 0.10(4) 增加到 x = 0.10 时的 0.36(10)。

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来源期刊

Crystallography Reports 化学-晶体学

CiteScore

1.10

自引率

28.60%

发文量

审稿时长

4-8 weeks

期刊介绍： Crystallography Reports is a journal that publishes original articles short communications, and reviews on various aspects of crystallography: diffraction and scattering of X-rays, electrons, and neutrons, determination of crystal structure of inorganic and organic substances, including proteins and other biological substances; UV-VIS and IR spectroscopy; growth, imperfect structure and physical properties of crystals; thin films, liquid crystals, nanomaterials, partially disordered systems, and the methods of studies.

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