X-ray imaging and multiferroic coupling of cycloidal magnetic domains in ferroelectric monodomain BiFeO3

Abstract

Magnetic domains at the surface of a ferroelectric monodomain BiFeO3 single crystal have been imaged by hard X-ray magnetic scattering. Magnetic domains up to several hundred microns in size have been observed, corresponding to cycloidal modulations of the magnetization along the wave-vector k=2π(δ,δ,0) and symmetry equivalent directions. The rotation direction of the magnetization in all magnetic domains, determined by diffraction of circularly polarized light, was found to be unique and in agreement with predictions of a combined approach based on a spin-model complemented by relativistic density-functional simulations. Imaging of the surface shows that the largest adjacent domains display a 120 degree vortex structure.

Published in Physical Review Letters

References in corpus (4)

• Spin current and magneto-electric effect in non-collinear magnets
• Electric-field-induced spin-flop in BiFeO3 single crystals at room-temperature
• Magnetic dispersion and anisotropy in multiferroic BiFeO3
• Singe ferroelectric and chiral magnetic domain of single-crystalline BiFeO${}_3$ in an electric field

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