Crystal Handedness and Spin Helix Chirality in Fe1xCoxSi

S. V. Grigoriev, D. Chernyshov, V. A. Dyadkin, V. Dmitriev, S. V. Maleyev, E. V. Moskvin, D. Menzel, J. Schoenes, and H. Eckerlebe
Phys. Rev. Lett. 102, 037204 – Published 22 January 2009

Abstract

We show, with the help of polarized neutrons, that the cubic magnets Fe1xCoxSi 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.

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  • Received 2 October 2008

DOI:https://doi.org/10.1103/PhysRevLett.102.037204

©2009 American Physical Society

Authors & Affiliations

S. V. Grigoriev1, D. Chernyshov2, V. A. Dyadkin1, V. Dmitriev2, S. V. Maleyev1, E. V. Moskvin1, D. Menzel3, J. Schoenes3, and H. Eckerlebe4

  • 1Petersburg Nuclear Physics Institute, Gatchina, 188300 St. Petersburg, Russia
  • 2Swiss-Norwegian Beamlines at the European Synchrotron Radiation Facility, Grenoble, 38000 France
  • 3Institut für Physik der Kondensierten Materie, TU Braunschweig, 38106 Braunschweig, Germany
  • 4GKSS Forschungszentrum, 21502 Geesthacht, Germany

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Vol. 102, Iss. 3 — 23 January 2009

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