The microscopic model of BiFeO3

R. S. Fishman

doi:10.1016/j.physb.2017.09.103

The microscopic model of BiFeO₃

R. S. Fishman

Multiscale Modeling & Materials by Desig

Research output: Contribution to journal › Article › peer-review

14 Scopus citations

Abstract

Many years and great effort have been spent constructing the microscopic model for the room temperature multiferroic BiFeO₃. However, earlier models implicitly assumed that the cycloidal wavevector q was confined to one of the three-fold symmetric axes in the hexagonal plane normal to the electric polarization. Because recent measurements indicate that q can be rotated by a magnetic field, it is essential to properly treat the anisotropy that confines q at low fields. We propose that the anisotropy energy −K₃S⁶sin⁶θcos6ϕ confines the wavevectors q to the three-fold axis ϕ=0 and ±2π/3 within the hexagonal plane with θ=π/2.

Original language	English
Pages (from-to)	115-117
Number of pages	3
Journal	Physica B: Physics of Condensed Matter
Volume	536
DOIs	https://doi.org/10.1016/j.physb.2017.09.103
State	Published - May 1 2018

Funding

Thanks to Istvan Kézsmárki for helpful discussions. Research sponsored by the U.S. Department of Energy, Office of Basic Energy Sciences, Materials Sciences and Engineering Division.

Keywords

Anisotropy
Domain
Multiferroic

Access to Document

10.1016/j.physb.2017.09.103

Cite this

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