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

O. Prokhnenko·R. Feyerherm·E. Dudzik·S. Landsgesell·N. Aliouane·L. C. Chapon·D. N. Argyriou
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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.

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O. Prokhnenko, R. Feyerherm, E. Dudzik, S. Landsgesell, N. Aliouane, L. C. Chapon, D. N. Argyriou. 2006-09-01. Enhanced ferroelectric polarization by induced Dy spin-order in multiferroic DyMnO3. https://doi.org/10.1103/physrevlett.98.057206

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