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Insights into the coupled phenomena in molecular multiferroic (ND<sub>4</sub>)<sub>2</sub>[FeCl<sub>5</sub>(D<sub>2</sub>O)] via inelastic neutron scattering studies

ORAL

Abstract

(ND4)2[FeCl5(D2O)] is a rare molecular magnet exhibiting direct coupling between magnetism and electric polarization as well as a very rich magnetic field versus temperature phase diagram[1-3]. In order to gain a deep understanding of the emergent coupled phenomena, we performed inelastic neutron scattering experiments to investigate the dynamics in this material. Our data analysis shows the spin dynamics can be described by a Heisenberg Hamiltonian model with an easy-plane anisotropy that captures the key observations. Our inelastic neutron scattering results also reveal the role the ion played in the intriguing properties observed in (NH4)2[FeCl5(H2O)].

References
[1] M Ackermann et al, New Journal of Physics 15, 123001 (2013).
[2] W. Tian et al, Phys. Rev. B 94, 214405 (2016).
[3] W. Tian et al, Phys. Rev. B 98, 054407 (2018).

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Presenters

  • Wei Tian

    Oak Ridge National Lab, Neutron Scattering Science Division, Oak Ridge National Laboratory, Oak Ridge National Laboratory, Oak Ridge National Laboratory, Oak Ridge

Authors

  • Wei Tian

    Oak Ridge National Lab, Neutron Scattering Science Division, Oak Ridge National Laboratory, Oak Ridge National Laboratory, Oak Ridge National Laboratory, Oak Ridge

  • Randy Fishman

    Oak Ridge National Lab, Materials Science and Technology Division, Oak Ridge National Laboratory, Oak Ridge, TN, Materials Science and Technology Division, OakRidge National Laboratory

  • Huibo Cao

    Oak Ridge National Lab, Oak Ridge National Laboratory, Neutron Scattering Division, Oak Ridge National Laboratory, Oak Ridge, TN 37831, USA, Neutron Scattering Division, Oak Ridge National Laboratory, Neutron Scattering Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA, Oak Ridge Natl Lab

  • Gabriele Sala

    Oak Ridge National Lab, Oak Ridge National Laboratory, Neutron Scattering Division, Oak Ridge National Laboratory, Neutron Scattering Division, Oak Ridge National Lab

  • Daniel M. Pajerowski

    Oak Ridge National Lab, Oak Ridge National Laboratory

  • Tao Hong

    Oak Ridge National Lab, Neutron Scattering Division, Oak Ridge National Laboratory, Oak Ridge National Laboratory, Oak Ridge National Lab, Neutron Scattering Division

  • Luke L. Daemen

    Oak Ridge National Lab

  • Yongqiang Cheng

    Oak Ridge National Lab, Oak Ridge National Laboratory

  • Jaime A. Fernandez-Baca

    Oak Ridge National Lab, Neutron Scattering Division, Oak Ridge National Laboratory