Controlling the Dzyaloshinskii-Moriya interaction to alter the chiral link between structure and magnetism for Fe1xCoxSi

S.-A. Siegfried, E. V. Altynbaev, N. M. Chubova, V. Dyadkin, D. Chernyshov, E. V. Moskvin, D. Menzel, A. Heinemann, A. Schreyer, and S. V. Grigoriev
Phys. Rev. B 91, 184406 – Published 14 May 2015

Abstract

Monosilicides of 3d metals frequently show a chiral magnetic ordering with the absolute configuration defined by the chirality of the crystal structure and the sign of the Dzyaloshinskii-Moriya interaction (DMI). Structural and magnetic chiralities are probed here for Fe1xCoxSi series and their mutual relationship is found to be dependent on the chemical composition. The chirality of crystal structure was previously shown to be governed by crystal growth, and the value of the DMI is nearly the same for all monosilicides of Fe, Co, and Mn. Our findings indicate that the sign of the DMI in Fe1xCoxSi is controlled by the Co composition x. We have been able to directly measure the change of the link between structure and magnetism in this helimagnetic B20 alloy.

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  • Received 16 February 2015
  • Revised 1 May 2015

DOI:https://doi.org/10.1103/PhysRevB.91.184406

©2015 American Physical Society

Authors & Affiliations

S.-A. Siegfried1, E. V. Altynbaev2,3, N. M. Chubova2, V. Dyadkin2,4, D. Chernyshov4, E. V. Moskvin2,3, D. Menzel5, A. Heinemann1, A. Schreyer1, and S. V. Grigoriev2,3

  • 1Helmholtz Zentrum Geesthacht, Geesthacht, 21502, Germany
  • 2Petersburg Nuclear Physics Institute, Gatchina, St. Petersburg, 188300, Russia
  • 3Saint-Petersburg State University, Ulyanovskaya 1, St. Petersburg, 198504, Russia
  • 4Swiss-Norwegian Beamlines at the European Synchrotron Radiation Facility, Grenoble, 38000, France
  • 5Institut für Physik der Kondensierten Materie, TU Braunschweig, 38106 Braunschweig, Germany

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Vol. 91, Iss. 18 — 1 May 2015

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