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

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

2006-03-23

arxiv.org/abs/cond-mat/0603613v1

Physical Review B 73, 180401(R) (2006)

Physics

Condensed Matter

Strongly Correlated Electrons

submitted to Phys. Rev. B Rapid Communications

Scientific paper

10.1103/PhysRevB.73.180401

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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