Direct coupling of ferromagnetic moment and ferroelectric polarization in BiFeO${}_3$

Abstract

The spin-driven component of electric polarization in a single crystal of multiferroic BiFeO${}_3$ was experimentally investigated in pulsed high magnetic fields up to 41 T. Sequential measurements of electric polarization for various magnetic field directions provide clear evidence of electric polarization normal to the hexagonal $c$ axis (${\mathbf{P}}_{\mathrm{t}}$) in not only the cycloidal phase, but also the field-induced canted antiferromagnetic phase. The direction of ${\mathbf{P}}_{\mathrm{t}}$ is directly coupled with the ferromagnetic moment in the canted antiferromagnetic phase, and thus controlled by changing the direction of the applied magnetic field. This magnetoelectric coupling is reasonably reproduced by the metal-ligand hybridization model.

References in corpus (7)

• Spin current and magneto-electric effect in non-collinear magnets
• Room temperature coexistence of large electric polarization and magnetic order in BiFeO3 single crystals
• Electric-field-induced spin-flop in BiFeO3 single crystals at room-temperature
• Singe ferroelectric and chiral magnetic domain of single-crystalline BiFeO${}_3$ in an electric field
• Symmetry Analysis of Spin-Dependent Electric Dipole and Its Application to Magnetoelectric Effects
• Spin flexoelectricity and chiral spin structures in magnetic films
• Pinning, Rotation, and Metastability of BiFeO${}_3$ Cycloidal Domains in a Magnetic Field

Cited by in corpus (1)

• The Magnetoelastic Distortion of Multiferroic BiFeO${}_3$ in the Canted Antiferromagnetic State