Spin Dynamics and Magnetoelectric Coupling Mechanism of Co4Nb2O9

Abstract

Neutron powder diffraction experiments reveal that Co4Nb2O9 forms a noncollinear in-plane magnetic structure with Co2+ moments lying in the ab plane. The spin-wave excitations of this magnet were measured by using inelastic neutron scattering and soundly simulated by a dynamic model involving nearest and next-nearest neighbour exchange interactions, in-plane anisotropy and the Dzyaloshinskii-Moriya interaction. The in-plane magnetic structure of Co4Nb2O9 is attributed to the large in-plane anisotropy while the noncollinearity of the spin configuration is attributed to the Dzyaloshinskii-Moriya interaction. The high magnetoelectric coupling effect of Co4Nb2O9 in fields can be explained by its special in-plane magnetic structure.

13pages, 3 figures

References in corpus (7)

• Spin current and magneto-electric effect in non-collinear magnets
• Role of the Dzyaloshinskii-Moriya interaction in multiferroic perovskites
• Magnetic inversion symmetry breaking and ferroelectricity in TbMnO3
• Linear spin wave theory for single-Q incommensurate magnetic structures
• Spin waves and the origin of commensurate magnetism in Ba2CoGe2O7
• Experimental and first-principles studies of magnetism and magnetoelectric effect in Co4Nb2O9 and Co4Ta2O9
• Multiboson spin-wave theory for Ba2CoGe2O7, a spin-3/2 easy-plane Neel antiferromagnet with strong single-ion anisotropy

Cited by in corpus (14)

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• Noncollinear magnetic structure and magnetoelectric coupling in buckled honeycomb Co${}_4$Nb${}_2$O${}_9$:A single crystal neutron diffraction study
• Anisotropy in the magnetization and magnetoelectric response of single crystalline Mn${}_4$Ta${}_2$O${}_9$
• Magnetic and structural properties of Ni-substituted magnetoelectric Co${}_4$Nb${}_2$O${}_9$
• Ferroaxial moment induced by vortex spin texture
• Noncollinear antiferromagnetic order in the buckled honeycomb lattice of magnetoelectric Co4Ta2O9 determined by single-crystal neutron diffraction
• Antiferromagnetic multi-level memristor using linear magnetoelectricity
• Successive dielectric anomalies and magnetoelectric coupling in honeycomb Fe${}_4$Nb${}_2$O${}_9$
• Symmetry Analysis of Magnetoelectric Effects in Honeycomb Antiferromagnet Co4Nb2O9
• Spin-phonon interactions and magnetoelectric coupling in Co${}_4$$B_2$O${}_9$ ($B$ = Nb, Ta)
• Contrasting magnetothermal conductivity in sibling Co-based honeycomb-lattice antiferromagnets
• Theoretical Study of Magnetoelectric Effects in Honeycomb Antiferromagnet Co4Nb2O9
• Nonreciprocal magnon excitations by the Dzyaloshinskii-Moriya interaction on the basis of bond magnetic toroidal multipoles