Universität zu Köln

Finger, T., Binder, K., Sidis, Y., Maljuk, A., Argyriou, D. N. and Braden, M. (2014). Magnetic order and electromagnon excitations in DyMnO3 studied by neutron scattering experiments. Phys. Rev. B, 90 (22). COLLEGE PK: AMER PHYSICAL SOC. ISSN 2469-9969

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Abstract

Magnetic order and excitations in multiferroic DyMnO3 were studied by neutron scattering experiments using a single crystal prepared with an enriched Dy-162 isotope. The ordering of Mn moments exhibits pronounced hysteresis arising from the interplay between Mn and Dy magnetism, which has a strong impact on the ferroelectric polarization. The magnon dispersion resembles that reported for TbMnO3. We identify the excitations at the magnetic zone center and near the zone boundary in the b direction, which can possess electromagnon character. The lowest frequency of the zone-center magnons is in good agreement with a signal in a recent optical measurement, so this mode can be identified as the electromagnon coupled by the same Dzyaloshinskii-Moriya interaction as the static multiferroic phase.

Item Type:	Journal Article
Creators:	Creators Email ORCID ORCID Put Code Finger, T. UNSPECIFIED UNSPECIFIED UNSPECIFIED Binder, K. UNSPECIFIED UNSPECIFIED UNSPECIFIED Sidis, Y. UNSPECIFIED UNSPECIFIED UNSPECIFIED Maljuk, A. UNSPECIFIED UNSPECIFIED UNSPECIFIED Argyriou, D. N. UNSPECIFIED UNSPECIFIED UNSPECIFIED Braden, M. UNSPECIFIED UNSPECIFIED UNSPECIFIED
URN:	urn:nbn:de:hbz:38-420104
DOI:	10.1103/PhysRevB.90.224418
Journal or Publication Title:	Phys. Rev. B
Volume:	90
Number:	22
Date:	2014
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 FERROELECTRIC POLARIZATION; TBMNO3 Multiple languages Materials Science, Multidisciplinary; Physics, Applied; Physics, Condensed Matter Multiple languages
URI:	http://kups.ub.uni-koeln.de/id/eprint/42010