The incommensurate magnetic structure of YMn2O5: a stringent test of the multiferroic mechanism

Details The incommensurate magnetic structure of YMn2O5: a stringent test of the multiferroic mechanism The incommensurate magnetic structure of YMn2O5: a stringent test of the multiferroic mechanism

2008-08-16

arxiv.org/abs/0808.2237v1

Physics

Condensed Matter

Materials Science

Scientific paper

10.1103/PhysRevB.79.020404

We have determined the magnetic structure of the low-temperature incommensurate phase of multiferroic YMn2O5 using single-crystal neutron diffraction. By employing corepresentation analysis, we have ensured full compliance with both symmetry and physical constraints, so that the electrical polarization must lie along the b axis, as observed. The evolution of the spin components and propagation through the commensurate-incommensurate phase boundary points unambiguously at the exchange-striction mechanism as the primary driving force for ferroelectricity.

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