Article (Scientific journals)
Spin-wave stiffness of the Dzyaloshinskii-Moriya helimagnet compounds Fe1−xCoxSi studied by small-angle neutron scattering
Grigoriev; Pschenichnyi; Altynbaev et al.
2019In Physical Review. B, Condensed Matter, 100, p. 094409
Peer Reviewed verified by ORBi
 

Files


Full Text
grigoriev2019.pdf
Publisher postprint (1.18 MB)
Download

All documents in ORBilu are protected by a user license.

Send to



Details



Abstract :
[en] The spin wave stiffness was measured by small-angle neutron scattering method in the Dzyaloshinskii-Moriya helimagnet compounds Fe1−xCoxSi with x=0.25,0.30,0.50. It has been shown that the spin wave dispersion in the fully polarized state is anisotropic due to Dzyaloshinskii-Moriya interaction. It is reflected in the neutron scattering pattern as two circles for neutrons obtaining and losing the magnon energy, respectively. The centers of the circles are shifted by the momentum transfer oriented along the applied magnetic field H and equal to the wave vector of the spiral ±ks. The radius of the circles is directly related to the stiffness of spin waves and depends on the magnetic field. We have found that the spin-wave stiffness A change weakly with temperature for each individual compound. On the other hand, the spin-wave stiffness A increases linearly with x in contrast to the x dependences of the critical temperature Tc and the low-temperature ordered moment. Experimentally obtained values of the stiffness A approve quantitative applicability of the Bak-Jensen model for the compounds under study.
Disciplines :
Physics
Author, co-author :
Grigoriev
Pschenichnyi
Altynbaev
Siegfried
Heinemann
Honecker, Dirk ;  University of Luxembourg > Faculty of Science, Technology and Communication (FSTC) > Physics and Materials Science Research Unit
Menzel
External co-authors :
yes
Language :
English
Title :
Spin-wave stiffness of the Dzyaloshinskii-Moriya helimagnet compounds Fe1−xCoxSi studied by small-angle neutron scattering
Publication date :
2019
Journal title :
Physical Review. B, Condensed Matter
ISSN :
1095-3795
Publisher :
American Physical Society, New York, United States - Maryland
Volume :
100
Pages :
094409
Peer reviewed :
Peer Reviewed verified by ORBi
Focus Area :
Physics and Materials Science
Available on ORBilu :
since 13 January 2020

Statistics


Number of views
50 (0 by Unilu)
Number of downloads
118 (0 by Unilu)

Scopus citations®
 
8
Scopus citations®
without self-citations
3
WoS citations
 
7

Bibliography


Similar publications



Contact ORBilu