Crystal Handedness and Spin Helix Chirality in Fe1-xCoxSi

Grigoriev, S.V.; Chernyshov, D.; Dyadkin, V.A.; Dmitriev, V.; Maleyev, S,V.; Moskvin, E.V.; Menzel, D.; Schoenes, J.; Eckerlebe, H.

Journalpaper

Crystal Handedness and Spin Helix Chirality in Fe1-xCoxSi

Abstract

We show, with the help of polarized neutrons, that the cubic magnets Fe1-xCoxSi with Dzyaloshinskii-Moriya interaction can be switched between left (for x=0.1, 0.15) and right (for x=0.2, 0.25, 0.3, 0.5) chiral states of the spin helix. The absolute structure was evaluated using x-ray diffraction. The crystals are shown to be enantiopure and the structural chirality changes from right handed for x<0.2 to left handed for x>0.2. These compounds are compared with the etalon sample of MnSi which is identified as having the left-handed chirality both in the magnetic and crystallographic sense.

DOI Link to Publication

URL: https://publications.hereon.de/id/27557/
Authors:Grigoriev, S.V., Chernyshov, D., Dyadkin, V.A., Dmitriev, V., Maleyev, S,V., Moskvin, E.V., Menzel, D., Schoenes, J., Eckerlebe, H.
Year:2009
In: Physical Review Letters
Volume:102
Issue:3
Pages:037204
Publisher:APS, Rige, NY
Type:Journalpaper
ISSN: 0031-9007
Cite as: Grigoriev, S.V.; Chernyshov, D.; Dyadkin, V.A.; Dmitriev, V.; Maleyev, S,V.; Moskvin, E.V.; Menzel, D.; Schoenes, J.; Eckerlebe, H.: Crystal Handedness and Spin Helix Chirality in Fe1-xCoxSi. In: Physical Review Letters. Vol. 102 (2009) 3, 037204. (DOI: 10.1103/PhysRevLett.102.037204)