Pressure effects on magnetic ground states in cobalt doped multiferroic Mn${}_{1-x}$Co${}_x$WO${}_4$

Abstract

Using ambient pressure x-ray and high pressure neutron diffraction, we studied the pressure effect on structural and magnetic properties of multiferroic Mn${}_{1-x}$Co${}_x$WO${}_4$ single crystals ($x=0,0.05,0.135$ and $0.17$), and compared it with the effects of doping. Both Co doping and pressure stretch the Mn-Mn chain along the $c$~direction. At high doping level ($x=0.135$ and $0.17$), pressure and Co doping drive the system in a similar way and induce a spin-flop transition for the $x=0.135$ compound. In contrast, magnetic ground states at lower doping level ($x=0$ and $0.05$) are robust against pressure but experience a pronounced change upon Co substitution. As Co introduces both chemical pressure and magnetic anisotropy into the frustrated magnetic system, our results suggest the magnetic anisotropy is the main driving force for the Co induced phase transitions at low doping level, and chemical pressure plays a more significant role at higher Co concentrations.

arXiv comment6 pages, 4 figures, to be published in Physical Rev. B

References in corpus (22)

• Spin current and magneto-electric effect in non-collinear magnets
• Ferroelectricity in spiral magnets
• Role of the Dzyaloshinskii-Moriya interaction in multiferroic perovskites
• Multiferroics: different ways to combine magnetism and ferroelectricity
• Ferroelectric polarization flop in a frustrated magnet MnWO${}_4$ induced by magnetic fields
• Spin-polarization coupling in multiferroic transition-metal oxides
• Bond electronic polarization induced by spin
• A New Multiferroic Material: MnWO4
• Long-Range Magnetic Interactions in the Multiferroic Antiferromagnet $\mathrm{MnW}{\mathrm{O}}_4$
• Local symmetry and magnetic anisotropy in multiferroic MnWO4 and antiferromagnetic CoWO4 studied by soft x-ray absorption spectroscopy
• Robust Ferroelectric State in Multiferroic Mn${}_{1-x}$Zn${}_x$WO${}_4$
• 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 switching and phase competition in the multiferroic antiferromagnet $\mathrm{M}{\mathrm{n}}_{1-\mathrm{x}}\mathrm{F}{\mathrm{e}}_{\mathrm{x}}\mathrm{W}{\mathrm{O}}_4$
• 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
• Origin of Multiferroicity in MnWO4
• Room-temperature vibrational properties of multiferroic MnWO4 under quasi-hydrostatic compression up to 39 GPa
• 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${}_4$