A New Multiferroic Material: MnWO4
  We report the multiferroic behaviour of MnWO$_4$, a magnetic oxide with monoclinic crystal structure and spiral long-range magnetic order. Based upon recent theoretical predictions MnWO$_4$ should exhibit ferroelectric polarization coexisting with the proper magnetic structure. We have confirmed the multiferroic state below 13 K by observing a finite electrical polarization in the magnetically ordered state via pyroelectric current measurements. 
O. Heyer, N. Hollmann, I. Klassen, S. Jodlauk, L. Bohaty, P. Becker,   J. A. Mydosh, T. Lorenz, D. Khomskii