Magnetic Reversal of the Ferroelectric Polarization in a Multiferroic Spinel Oxide

Abstract

Ferroelectric transition has been detected in a ferrimagnetic spinel oxide of CoCr2O4 upon the transition to the conical spin order below 25 K. The direction [110] of the spontaneous polarization is normal to both the magnetization easy axis [001] and to the propagation axis [110] of the transverse spiral component, in accord with the prediction based on the spin-current model. The reversal of the spontaneous magnetization by a small magnetic field (approximately 0.1 T) induces the reversal of the spontaneous polarization, indicating the clamping of the ferromagnetic and ferroelectric domain walls.

Zero- and finite-temperature mean field study of magnetic field induced electric polarization in Ba2CoGe2O7Romhányi1, Lajkó2, Penc3 2011Phys. Rev. B334300View full textAdd to dashboardCite

“…Following from the different spin length on the sublattices A and B a suitable order parameter is |S A | − |S B |, therefore we refer to this phase as a canted ferrimagnetic phase. The ground state can still be written as in (10), but here η A = η B . The angle between the spins on sublattices A and B is determined by the collective effect of K z , D z and h [110] .…”

Spin-wave and electromagnon dispersions in multiferroicMnWO4as observed by neutron spectroscopy: Isotropic Heisenberg exchange versus anisotropic Dzyaloshinskii-Moriya interaction

“…Given that strong coupling between the magnetic and ferroelectric orders exists intrinsically in spin-driven ferroelectrics, magnetic field control of spontaneous polarization and/or electric field control of the magnetization have been successfully demonstrated in several spin-driven multiferroics 15,19 . Moreover, the cross-control between electric and magnetic dipoles in multiferroics is found to be accompanied by the dynamical motion of multiferroic domain walls [19][20][21] .…”

Synthesis of Cobalt Chromite Nanoparticles by Thermolysis of Mixed Cr3+ and Co2+ Chelates of 2-Mercaptopyridin N-Oxide

“…It is an insulating and normal spinel compound [1][2][3][4][5] and has various catalytic activity such as water gas shift reaction, combustion of halogenated hydrocarbons, alkylation of phenol, dehydrogenation and hydrogenation [6][7][8][9][10][11]. It is also used as ceramic material, heat resistant pigment [12,13], substrate for epitaxial growths [14,15], high density magnetic memory media, etc [16][17][18].…”