S. V. Grigoriev, V. A. Dyadkin, S. V. Maleyev, D. Menzel, J. Schoenes, D. Lamago, E. V. Moskvin, H. Eckerlebe, “Noncentrosymmetric cubic helical ferromagnets Mn$_{1-y}$Fe$_y$Si and Fe$_{1-x}$Co$_x$Si”, Fizika Tverdogo Tela, 2010, Volume 52, Issue 5,Pages 852

This article is cited in 12 papers

XX Anniversary Meeting on the Use of Neutron Scattering in Condensed Matter Research (RNICS-2008), Gatchina (October 13-18, 2008)
Magnetism and strongly correlated electronic systems

Noncentrosymmetric cubic helical ferromagnets Mn$_{1-y}$Fe$_y$Si and Fe$_{1-x}$Co$_x$Si

S. V. Grigoriev^a, V. A. Dyadkin^a, S. V. Maleyev^a, D. Menzel^b, J. Schoenes^b, D. Lamago^c, E. V. Moskvin^a, H. Eckerlebe^d

^a The Petersburg Nuclear Physics Institute, The National Research Center "Kurchatov Institute"
^b Technische Universität Braunschweig, Braunschweig, Germany
^c Laboratoire Leon Brillouin, Saclay, Franse
^d GKSS Forschungszentrum, Geesthacht, Germany

Abstract: Two systems of noncentrosymmetric cubic helical magnets Mn$_{1-y}$Fe$_y$Si ($y$ = 0, 0.06, 0.08, 0.1) and Fe$_{1-x}$Co$_x$Si ($x$ = 0.10, 0.15, 0.20, 0.25, 0.30, 0.35, 0.50) have been compared. The concentration dependences of the critical temperature and magnetic field have been obtained using small-angle polarized-neutron scattering and analyzed in the framework of the Bak–Jensen model. It has been established that, among the two interactions that play the main role in these systems, i.e., the isotropic symmetric ferromagnetic exchange and the Dzyaloshinskii–Moriya isotropic antisymmetric interaction, the former interaction determines the critical temperature in the Mn$_{1-y}$Fe$_y$Si system and the latter interaction determines this temperature in the Fe$_{1-x}$Co$_x$Si system.