A Neutron diffraction study of multiferroics RMn2O5

Details A Neutron diffraction study of multiferroics RMn2O5 A Neutron diffraction study of multiferroics RMn2O5

2008-06-25

arxiv.org/abs/0806.4128v1

Physics

Condensed Matter

Materials Science

IOP Review

Scientific paper

10.1088/0953-8984/20/43/434213

The magnetic properties of RMn2O5 multiferrroics as obtained by unpolarized and polarized neutron diffraction experiments are reviewed. We discuss the qualitative features of the magnetic phase diagram both in zero magnetic field and in field and analyze the commensurate magnetic structure and its coupling to an applied electric field. The origin of ferrolectricity is discussed based on calculations of the ferroelectric polarization predicted by different microscopic coupling mechanisms (exchange striction and cycloidal spin-orbit models). A minimal model containing a small set of parameters is also presented in order to understand the propagation of the magnetic structure along the c-direction.

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