Magnetic switching and phase competition in the multiferroic antiferromagnet $\mathrm{M}{\mathrm{n}}_{1-\mathrm{x}}\mathrm{F}{\mathrm{e}}_{\mathrm{x}}\mathrm{W}{\mathrm{O}}_4$

Abstract

Elastic neutron scattering is used to study the spin correlations in the multiferroic $\mathrm{M}{\mathrm{n}}_{1-\mathrm{x}}\mathrm{F}{\mathrm{e}}_{\mathrm{x}}\mathrm{W}{\mathrm{O}}_4$ with $x=0.035,0.05$ and 0.10. The noncollinear, incommensurate (ICM) magnetic structure associated with the ferroelectric (FE) phase in pure $\mathrm{MnW}{\mathrm{O}}_4$ is suppressed at $x=0.035$ and completely absent at $x=0.10$. The ICM spin order and FE phase can be restored by applying a magnetic field along the spin easy-axis. The low-$T$ commensurate magnetic structure extends in both H/T with increasing Fe concentration. The systematic evolution of the magnetic and electric properties indicates that the noncollinear ICM spin order results from competing magnetic interactions and its stabilization can be tuned by the internal ($x$) or external (magnetic field) perturbations.

4 pages, 4 figures, submitted to Phys. Rev. B

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• Effect of nonmagnetic substituents Mg and Zn on the phase competition in the multiferroic antiferromagnet MnWO4
• Magnetic orders and spin-flop transitions in the cobalt doped multiferroic $\mathrm{M}{\mathrm{n}}_{1-\mathrm{x}}\mathrm{C}{\mathrm{o}}_{\mathrm{x}}\mathrm{W}{\mathrm{O}}_4$
• Magnetic and multiferroic phases of single-crystalline Mn${}_{0.85}$Co${}_{0.15}$WO${}_4$
• Magnetic structure and ferroelectric polarization of MnWO4 investigated by density functional calculations and classical spin analysis
• Electronic structure and anomalous band-edge absorption feature in multiferroic MnWO4: An optical spectroscopic study
• Helicity, anisotropies and their competition in a multiferroic magnet: insight from the phase diagram
• Landau theory for the phase diagram of the multiferroic Mn${}_{1-x}$(Fe,Zn,Mg)${}_x$WO${}_4$
• Spin-Wave and Electromagnon Dispersions in Multiferroic MnWO4 as Observed by Neutron Spectroscopy: Isotropic Heisenberg Exchange versus Anisotropic Dzyaloshinskii-Moriya Interaction
• Tuning magnetoelectricity in a mixed-anisotropy antiferromagnet
• Pressure effects on magnetic ground states in cobalt doped multiferroic Mn${}_{1-x}$Co${}_x$WO${}_4$
• Single-crystal investigations on the multiferroic material LiFe(WO${}_4$)${}_2$