NDLI: Magnetoelectric Ordering of BiFeO$_{3}$ from the Perspective of Crystal Chemistry

Content Provider	Springer Nature Link
Author	Volkova, L. M. Marinin, D. V.
Copyright Year	2011
Abstract	In this paper we examine the role of crystal chemistry factors in creating conditions for formation of magnetoelectric ordering in BiFeO$_{3}$. It is generally accepted that the main reason of the ferroelectric distortion in BiFeO$_{3}$ is concerned with a stereochemical activity of the Bi lone pair. However, the lone pair is stereochemically active in the paraelectric orthorhombic ß-phase as well. We demonstrate that a crucial role in emerging of phase transitions of the metal-insulator, paraelectric-ferroelectric and magnetic disorder-order types belongs to the change of the degree of the lone pair stereochemical activity—its consecutive increase with the temperature decrease. Using the structural data, we calculated the sign and strength of magnetic couplings in BiFeO$_{3}$ in the range from 945 °C down to 25 °C and found the couplings, which undergo the antiferromagnetic → ferromagnetic transition with the temperature decrease and give rise to the antiferromagnetic ordering and its delay in regard to temperature, as compared to the ferroelectric ordering. We discuss the reasons of emerging of the spatially modulated spin structure and its suppression by doping with La$^{3+}$.
Starting Page	2161
Ending Page	2177
Page Count	17
File Format	PDF
ISSN	15571939
Journal	Journal of Superconductivity and Novel Magnetism
Volume Number	24
Issue Number	7
e-ISSN	15571947
Language	English
Publisher	Springer US
Publisher Date	2011-05-12
Publisher Place	Boston
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Magnetoelectric ordering BiFeO$_{3}$ Lone pair Insulator-metal transition Strongly Correlated Systems, Superconductivity Characterization and Evaluation of Materials Magnetism, Magnetic Materials Condensed Matter Physics
Content Type	Text
Resource Type	Article
Subject	Electronic, Optical and Magnetic Materials Condensed Matter Physics

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