Robust Ferroelectric State in Multiferroic Mn${}_{1-x}$Zn${}_x$WO${}_4$

Abstract

We report the remarkably robust ferroelectric state in the multiferroic compound Mn${}_{1-x}$Zn${}_x$WO${}_4$. The substitution of the magnetic Mn${}^{2+}$ with nonmagnetic Zn${}^{2+}$ reduces the magnetic exchange and provides control of the various magnetic and multiferroic states of MnWO${}_4$. Only 5 % of Zn substitution results in a complete suppression of the frustrated collinear (paraelectric) low temperature phase. The helical magnetic and ferroelectric phase develops as the ground state. The multiferroic state is stable up to a high level of substitution of more than 50 %. The magnetic, thermodynamic, and dielectric properties as well as the ferroelectric polarization of single crystals of Mn${}_{1-x}$Zn${}_x$WO${}_4$ are studied for different substitutions up to x=0.5. The magnetic phases have been identified in single crystal neutron scattering experiments. The ferroelectric polarization scales with the neutron intensity of the incommensurate peak of the helical phase.

6 pages, 8 figures

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Cited by in corpus (9)

• Long-Range Magnetic Interactions in the Multiferroic Antiferromagnet $\mathrm{MnW}{\mathrm{O}}_4$
• Diagonal magnetoelectric susceptibility and effect of Fe-doping in a polar ferrimagnet Mn2Mo3O8
• Magnetic orders and spin-flop transitions in the cobalt doped multiferroic $\mathrm{M}{\mathrm{n}}_{1-\mathrm{x}}\mathrm{C}{\mathrm{o}}_{\mathrm{x}}\mathrm{W}{\mathrm{O}}_4$
• Crystal structure, incommensurate magnetic order and ferroelectricity in mn${}_{1-x}$cu${}_x$wo${}_4$ (x=0-0.19)
• The complex multiferroic phase diagram of Mn${}_{1-x}$Co${}_x$WO${}_4$
• Magnetic field-induced spontaneous polarization reversal in multiferroic Mn${}_{0.85}$Co${}_{0.15}$WO${}_4$
• 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
• Pressure effects on magnetic ground states in cobalt doped multiferroic Mn${}_{1-x}$Co${}_x$WO${}_4$