Journal Article

IMPULSE-2025-00021

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Chiral order and multiferroic domain relaxation in NaFeGe$_{2}$O$_{6}$

Biesenkamp, S. (Corresponding author)MLZ* ; Gorkov, D.MLZ* ; Schmidt, W. ; Schmalzl, K. ; Sidis, Y. ; Becker, P. ; Bohatý, L. ; Braden, M.

2021
Inst. Woodbury, NY

Please use a persistent id in citations: doi:10.1103/PhysRevB.104.174405

Abstract: The magnetic structure and the multiferroic relaxation dynamics of NaFeGe2⁢O6 were studied by neutron scattering on single crystals partially utilizing polarization analysis. In addition to the previously reported transitions, the incommensurate spiral ordering of Fe3+ moments in the 𝑎⁢𝑐 plane develops an additional component along the crystallographic 𝑏 direction below 𝑇≈5K, which coincides with a lock-in of the incommensurate modulation. The quasistatic control of the spin-spiral handedness, respectively of the vector chirality, by external electric fields proves the invertibility of multiferroic domains down to the lowest temperature. Time-resolved measurements of the multiferroic domain inversion in NaFeGe2⁢O6 reveal a simple temperature and electric-field dependence of the multiferroic relaxation that is well described by a combined Arrhenius-Merz relation, as it has been observed for TbMnO3. The maximum speed of domain wall motion is comparable to the spin-wave velocity deduced from an analysis of the magnon dispersion.

Keyword(s): Magnetic Materials (1st) ; Magnetism (2nd)

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Contributing Institute(s):

1. KOMPASS (KOMPASS)

Experiment(s):

1. ILL-IN12: Cold neutron 3-axis spectrometer

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; Clarivate Analytics Master Journal List ; Current Contents - Electronics and Telecommunications Collection ; Current Contents - Physical, Chemical and Earth Sciences ; Ebsco Academic Search ; Essential Science Indicators ; IF < 5 ; JCR ; SCOPUS ; Science Citation Index Expanded ; Web of Science Core Collection

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