Spin-lattice coupling, frustration and magnetic order in multiferroic RMnO3

Details Spin-lattice coupling, frustration and magnetic order in multiferroic RMnO3 Spin-lattice coupling, frustration and magnetic order in multiferroic RMnO3

2009-05-29

arxiv.org/abs/0905.4824v1

Physics

Condensed Matter

Strongly Correlated Electrons

4 pages, 3 figures, 1 table

Scientific paper

We have performed high resolution neutron diffraction and inelastic neutron scattering experiments in the frustrated multiferroic hexagonal compounds RMnO3 (R=Ho, Yb, Sc, Y), which provide evidence of a strong magneto-elastic coupling in the the whole family. We can correlate the atomic positions, the type of magnetic structure and the nature of the spin waves whatever the R ion and temperature. The key parameter is the position of the Mn ions in the unit cell with respect to a critical threshold of 1/3, which determines the sign of the coupling between Mn triangular planes.

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