Writing and reading chiral domains in multiferroic DyMnO_3 using soft X-rays

Abstract

Sizeable b and c components of the 4f moments and pronounced circular dichroism are observed in the ferroelectric phase of DyMnO_3 by soft X-ray diffraction at the Dy-M_5 resonance. This points to cycloidal order of the 4f moments and indicates that inversion-symmetry breaking in this material is not characteristic of the Mn spins alone. The circular dichroism allows to image chiral domains that are imprinted on the surface of a DyMnO${}_3$ single crystal, exploiting the local charging by the X-ray beam via the photoelectric effect. These findings suggest a novel approach to control and image domains and domain walls in multiferroic materials.

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• Transfer of magnetic order and anisotropy through epitaxial integration of 3$d$ and 4$f$ spin systems
• Strongly coupled charge, orbital and spin order in TbTe${}_3$
• Crystal Symmetry Lowering in Chiral Multiferroic Ba${}_3$TaFe${}_3$Si${}_2$O${}_{14}$ observed by X-Ray Magnetic Scattering
• Imprinting magnetic information in manganites with X-rays
• Long range antiferromagnetic order of formally non-magnetic Eu${}^{3+}$ Van Vleck ions observed in multiferroic Eu${}_{1-x}$Y${}_x$MnO${}_3$
• Magnetic field dependent cycloidal rotation in pristine and Ge doped CoCr${}_2$O${}_4$
• Imprint of charge and oxygen orders on Dy ions in DyBa${}_2$Cu${}_3$O${}_{6+x}$ thin films probed by resonant x-ray scattering