X-ray PDF analysis of BiFeO-Bi(Mg,Ti)O mixture

Yoneda, Yasuhiro ; Wada, Satoshi*

BiFeO is a useful ferroelectric material, but it is not easy to reverse the polarization because the rhombohedral structure of the ferroelectric phase is greatly distorted, and attempts have been made to improve the dielectric properties by various additives. BaTiO and Bi(Mg $_{0.5}$ Ti $_{0.5}$ )O were selected as additives, and structural analysis was performed using synchrotron radiation. BiFeO has a rhombohedral structure and BaTiO has a tetragonal structure. Bi(Mg $_{0.5}$ Ti $_{0.5}$ )O has an antiferroelectric orthorhombic structure and is expected to behave as a buffer that binds BiFeO and BaTiO. The process of averaging the structure from micro to macro was clarified, and various changes were observed depending on the temperature. The flexibility of such a structure reduces the large distortion of BiFeO $_{3}$ and enables polarization.

Language	:	Japanese
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Meeting title	:	第31回日本MRS年次大会
Held date	:	2021/12
Location (city)	:	横浜
Location (country)	:	日本
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Keywords	:	ferroelectrics; pair distribution function; Synchrotron Radiation
Research Facility	:	SPring-8(大型放射光施設)
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Registration No. : BB20211040
JAEA Abstracts No. :
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