Electric field switching of antiferromagnetic domains in YMn2O5: a probe of the multiferroic mechanism

Details Electric field switching of antiferromagnetic domains in YMn2O5: a probe of the multiferroic mechanism Electric field switching of antiferromagnetic domains in YMn2O5: a probe of the multiferroic mechanism

2008-03-26

arxiv.org/abs/0803.3736v1

Physics

Condensed Matter

Materials Science

Scientific paper

10.1103/PhysRevLett.101.067205

We employ neutron spherical polarimetry to determine the nature and population of the coexisting antiferromagnetic domains in multiferroic YMn2O5. By applying an electric field, we prove that reversing the electrical polarization results in the population inversion of two types of in-plane domains, related to each other by inversion. Our results are completely consistent with the exchange striction mechanism of ferroelectricity, and support a unified model where cycloidal ordering is induced by coupling to the main magnetic order parameter.

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