Effect of magnetic field and temperature on the ferroelectric loop in ${\text{MnWO}}_4$

The ferroelectric properties of ${\text{MnWO}}_4$ single crystal have been investigated. Despite a relatively low remanent polarization, we show that the sample is ferroelectric. The shape of the ferroelectric loop of ${\text{MnWO}}_4$ strongly depends on magnetic field and temperature. While its dependence does not directly correlate with the magnetocapacitance effect before the paraelectric transition, the effect of magnetic field on the ferroelectric polarization loop supports magnetoelectric coupling.

Figure 1

(Color online) (a) Ferroelectric loops obtained as a result of current integration at different temperatures. (b) Corresponding voltage-current characteristics taken at different temperatures.

Figure 2

Remanent polarization extracted from ferroelectric $P\left(E\right)$ loops and the forced polarization recorded at heating with the previous electric (520 kV/m) cooling procedure. The inset shows the ferroelectric coercive force as a function of temperature.

Figure 3

(Color online) (a) Ferroelectric loops obtained as a result of the ferroelectric current integration at different magnetic fields at 10 K. (b) Voltage-current characteristics taken at 10 K at different magnetic fields.

Figure 4

(Color online) The magnetic field dependence of the dielectric permittivity at 500 kHz (left scale) and ferroelectric coercive force (right scale) at 10 K. The electric and magnetic fields applied parallel to the crystallographic $b$ axis.