TY  - CONF
AU  - BIESENKAMP, SEBASTIAN
AU  - SIDIS, YVAN
AU  - QURESHI, NAVID
AU  - GORKOV, DMITRY
AU  - SCHMALZL, KARIN
AU  - SCHMIDT, WOLFGANG
AU  - BECKER, PETRA
AU  - BOHATÝ, LADISLAV
AU  - BRADEN, MARKUS
TI  - Dimerization in the commensurate antiferromagnetic phase of MnWO4 and NaFe(WO4)2
M1  - FZJ-2020-01069
PY  - 2020
AB  - 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)
T2  - DPG-Frühjahrstagung der Sektion Kondensierte Materie (SKM)
CY  - 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
LB  - PUB:(DE-HGF)24
UR  - https://juser.fz-juelich.de/record/873877
ER  -