Universität zu Köln

Biesenkamp, S., Gorkov, D., Schmidt, W., Schmalzl, K., Sidis, Y., Becker, P., Bohaty, L. and Braden, M. (2021). Chiral order and multiferroic domain relaxation in NaFeGe2O6. Phys. Rev. B, 104 (18). COLLEGE PK: AMER PHYSICAL SOC. ISSN 2469-9969

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Abstract

The magnetic structure and the multiferroic relaxation dynamics of NaFeGe2O6 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 ac plane develops an additional component along the crystallographic b direction below T approximate to 5 K, 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 NaFeGe2O6 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.

Item Type:	Journal Article
Creators:	Creators Email ORCID ORCID Put Code Biesenkamp, S. UNSPECIFIED UNSPECIFIED UNSPECIFIED Gorkov, D. UNSPECIFIED UNSPECIFIED UNSPECIFIED Schmidt, W. UNSPECIFIED UNSPECIFIED UNSPECIFIED Schmalzl, K. UNSPECIFIED UNSPECIFIED UNSPECIFIED Sidis, Y. UNSPECIFIED UNSPECIFIED UNSPECIFIED Becker, P. UNSPECIFIED UNSPECIFIED UNSPECIFIED Bohaty, L. UNSPECIFIED UNSPECIFIED UNSPECIFIED Braden, M. UNSPECIFIED UNSPECIFIED UNSPECIFIED
URN:	urn:nbn:de:hbz:38-588062
DOI:	10.1103/PhysRevB.104.174405
Journal or Publication Title:	Phys. Rev. B
Volume:	104
Number:	18
Date:	2021
Publisher:	AMER PHYSICAL SOC
Place of Publication:	COLLEGE PK
ISSN:	2469-9969
Language:	English
Faculty:	Unspecified
Divisions:	Unspecified
Subjects:	no entry
Uncontrolled Keywords:	Keywords Language PHASE-CHANGE; MAGNETIC-STRUCTURE; KINETICS Multiple languages Materials Science, Multidisciplinary; Physics, Applied; Physics, Condensed Matter Multiple languages
URI:	http://kups.ub.uni-koeln.de/id/eprint/58806