This title appears in the Scientific Report :
2020
Dimerization in the commensurate antiferromagnetic phase of MnWO4 and NaFe(WO4)2
Dimerization in the commensurate antiferromagnetic phase of MnWO4 and NaFe(WO4)2
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 anharmon...
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Personal Name(s): | BIESENKAMP, SEBASTIAN |
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SIDIS, YVAN / QURESHI, NAVID / GORKOV, DMITRY / SCHMALZL, KARIN / SCHMIDT, WOLFGANG / BECKER, PETRA / BOHATÝ, LADISLAV / BRADEN, MARKUS | |
Contributing Institute: |
Streumethoden; JCNS-2 JCNS-ILL; JCNS-ILL JARA-FIT; JARA-FIT Streumethoden; PGI-4 |
Imprint: |
2020
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Conference: | DPG-Frühjahrstagung der Sektion Kondensierte Materie (SKM), Technischen Universität Dresden, Campus Südvorstadt (Germany), 2020-03-15 - 2020-03-20 |
Document Type: |
Poster |
Research Program: |
Jülich Centre for Neutron Research (JCNS) Materials and Processes for Energy and Transport Technologies Quantum Condensed Matter: Magnetism, Superconductivity Controlling Collective States Controlling Collective States |
Publikationsportal JuSER |
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) |