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Commensurate Dy magnetic ordering associated with incommensurate lattice distortion in orthorhombic DyMnO3

R. Feyerherm·E. Dudzik·N. Aliouane·D. N. Argyriou
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Abstract

Synchrotron x-ray diffraction and resonant magnetic scattering experiments on single crystal DyMnO3 have been carried out between 4 and 40 K. Below TN(Dy) = 5K, the Dy magnetic moments order in a commensurate structure with propagation vector 0.5 b*. Simultaneous with the Dy magnetic ordering, an incommensurate lattice modulation with propagation vector 0.905 b* evolves while the original Mn induced modulation is suppressed and shifts from 0.78 b* to 0.81 b*. This points to a strong interference of Mn and Dy induced structural distortions in DyMnO3 besides a magnetic coupling between the Mn and Dy magnetic moments.

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R. Feyerherm, E. Dudzik, N. Aliouane, D. N. Argyriou. 2006-03-23. Commensurate Dy magnetic ordering associated with incommensurate lattice distortion in orthorhombic DyMnO3. https://doi.org/10.1103/physrevb.73.180401

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