Enhanced ferroelectric polarization by induced Dy spin-order in multiferroic DyMnO3

Abstract

Neutron powder diffraction and single crystal x-ray resonant magnetic scattering measurements suggest that Dy plays an active role in enhancing the ferroelectric polarization in multiferroic DyMnO3 above TNDy = 6.5 K. We observe the evolution of an incommensurate ordering of Dy moments with the same periodicity as the Mn spiral ordering. It closely tracks the evolution of the ferroelectric polarization which reaches a maximum value of 0.2 muC/m^2. Below TNDy, where Dy spins order commensurately, the polarization decreases to values similar for those of TbMnO3.

References in corpus (4)

• Ferroelectricity in spiral magnets
• Magnetic inversion symmetry breaking and ferroelectricity in TbMnO3
• Distorted Perovskite with e_g^1 Configuration as a Frustrated Spin System
• Commensurate Dy magnetic ordering associated with incommensurate lattice distortion in orthorhombic DyMnO3

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