A Neutron diffraction study of multiferroics RMn2O5
arXiv:0806.4128 · doi:10.1088/0953-8984/20/43/434213
Abstract
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.
IOP Review
References in corpus (11)
- Spin-polarization coupling in multiferroic transition-metal oxides
- Erratum: Landau Analysis of the Symmetry of the Magnetic Structure and Magnetoelectric Interaction in Multiferroics [Phys. Rev. B 76, 05447 (2007)]
- Ferroelectricity driven by the non-centrosymmetric magnetic ordering in multiferroic TbMn_2O_5: a first-principles study
- First-principles study of the lattice and electronic structures of TbMnO
- Complex Spin Structures and Origin of the Magneto-Electric Coupling in YMn2O5
- Electric field switching of antiferromagnetic domains in YMn2O5: a probe of the multiferroic mechanism
- Symmetry constraints on the electrical polarization in novel multiferroic materials
- Effect of Inversion Symmetry on Incommensurate Order in Multiferroic RMn2O5, R=rare earth
- An x-ray resonant diffraction study of multiferroic DyMn2O5
- The commensurate phase of multiferroic HoMn2O5 studied by X-ray magnetic scattering
- Order Parameters and Phase Diagram of Multiferroic RMnO