2015/11/26 by A. F. Popkov, M. D. Davydova, Margarita Davydova +6 · 45 citations
Chemistry · Earth and Planetary Sciences · Materials Science · Mathematics · Physics and Astronomy · #Antiferromagnetism #Chemistry #Condensed matter physics #Dielectric #Electric field #Ferroelectric and Piezoelectric Materials #Ferroelectricity #Field (mathematics) #Magnetic field #Magnetization #Materials science #Mathematics #Multiferroics #Multiferroics and related materials #Physical chemistry #Physics #Polarization (electrochemistry) #Polarization density #Pure mathematics #Quantum mechanics #Underwater Acoustics Research #cond-mat.mtrl-sci
paper · pdf · doi:10.1103/physrevb.93.094435
published in Physical review. B./Physical review. B 93(9) (American Physical Society) · 12 pages, 2 figures, submitted to Physical Review Letters
arxiv created 2015/11/26 · openalex publication_date 2016/03/29 · arxiv updated 2016/04/06 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
In this article the mechanism of the linear magnetoelectric (ME) effect in the rhombohedral multiferroic BiFeO3 is considered. The study is based on the symmetry approach of the Ginzburg-Landau type, in which polarization, antiferrodistortion, and antiferromagnetic momentum vectors are viewed as ordering parameters. We demonstrate that the linear ME effect in BFO is caused by reorientation of the antiferrodistortion vector in either electric or magnetic field. The numerical estimations, which show quantitative agreement with the results of the recent measurements in film samples, have been performed. A possibility of significant enhancement of the magnetoelectric effect by applying an external static electric field has been investigated. The considered approach is promising for explaining the high values of the ME effect in composite films and heterostructures with BFO.