Crystal handedness and spin helix chirality in Fe1-xCoxSi.
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.
Grigoriev
S V
SV
Petersburg Nuclear Physics Institute, Gatchina, 188300 St. Petersburg, Russia.
Chernyshov
D
D
Dyadkin
V A
VA
Dmitriev
V
V
Maleyev
S V
SV
Moskvin
E V
EV
Menzel
D
D
Schoenes
J
J
Eckerlebe
H
H