%0 Conference Paper
%A BIESENKAMP, SEBASTIAN
%A SIDIS, YVAN
%A QURESHI, NAVID
%A GORKOV, DMITRY
%A SCHMALZL, KARIN
%A SCHMIDT, WOLFGANG
%A BECKER, PETRA
%A BOHATÝ, LADISLAV
%A BRADEN, MARKUS
%T Dimerization in the commensurate antiferromagnetic phase of MnWO4 and NaFe(WO4)2
%M FZJ-2020-01069
%D 2020
%X In multiferoic MnWO4, the relaxation time of the multiferroic domain inversion shows a peculiar temperature dependence. Upon cooling below the multiferroic transition the relaxation time first increases but becomes faster closer to the commensurate low-temperature phase [1]. We investigated anharmonicities in this material as well as in isostructural NaFe(WO4)2 and propose the enhanced anharmonicities close to the low-temperature magnetic up-up-down-down structure to be responsible for the faster relaxation rates in MnWO4. In both materials there is a similar competition between incommensurate cycloid and commensurate up-up-down-down order, and anharmonic squaring up appears as a precursor in the incommensurate structure [2]. The commensurate magnetic structure is associated with structural dimerization in both materials, that has been quantitatively determined for NaFe(WO4)2 by a four-circle neutron diffraction experiment. [1]: M. Baum, Phys. Rev. B 89, 144406 (2014) [2]: S. Holbein, Phys. Re. B 94, 104423 (2016)
%B DPG-Frühjahrstagung der Sektion Kondensierte Materie (SKM)
%C 15 Mar 2020 - 20 Mar 2020, Technischen Universität Dresden, Campus Südvorstadt (Germany)
Y2 15 Mar 2020 - 20 Mar 2020
M2 Technischen Universität Dresden, Campus Südvorstadt, Germany
%F PUB:(DE-HGF)24
%9 Poster
%U https://juser.fz-juelich.de/record/873877