The Microscopic Model of BiFeO${}_3$

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 axis 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 show that the anisotropy energy $-K_3{S}^6{\sin }^6\theta \cos 6\varphi$ confines the wavevectors q to the three-fold axis $\varphi =0$ and $+-2\pi /3$ within the hexagonal plane with $\theta =\pi /2$.

References in corpus (4)

• Multiferroics: different ways to combine magnetism and ferroelectricity
• Room temperature coexistence of large electric polarization and magnetic order in BiFeO3 single crystals
• Magnetic dispersion and anisotropy in multiferroic BiFeO3
• Temperature-Dependent Interplay of Dzyaloshinskii-Moriya Interaction and Single-Ion Anisotropy in Multiferroic BiFeO${}_3$

Cited by in corpus (3)

• Magnetic Interactions in BiFeO${}_3$: a First-Principles Study
• The Magnetoelastic Distortion of Multiferroic BiFeO${}_3$ in the Canted Antiferromagnetic State
• Spin-current driven Dzyaloshinskii-Moriya interaction in the multiferroic BiFeO3 from first-principles