Chiral magnetic ordering due to Dzyaloshinsky-Moriya interaction in
nanostructures is
studied theoretically [1]. Several competing Dzyaloshinsky-Moriya vectors are introduced on the basis
of symmetry arguments. The role of the exchange interaction, magnetic anisotropy and dipolar cou-
pling for the ordering in chiral nanomagnets is investigated. It is demonstrated that the periodicity
of the modulated structure, which is determined by all interactions involved, is lattice dependent;
the direction of spiral propagation and orientation of magnetization is determined by the compe-
tition between diferent Dzyaloshinsky-Moriya vectors and anisotropy; the anisotropy can induce a
domain formation or destroy the chiral ordering depending on its orientation. We show that the
Dzyaloshinsky-Moriya coupling is responsible for the chiral magnetic
ordering in Fe/W(110)[2].
1. E. Y. Vedmedenko, L. Udvardi, P. Weinberger, and R. Wiesendanger, to be published in Phys. Rev. B (2007).
2. 12. E. Y. Vedmedenko, A. Kubetzka, K. von Bergmann, O. Pietzsch, M. Bode, H. P. Oepen, J. Kirschner, and R. Wiesendanger, Phys. Rev. Lett. 92, 077207 (2004). |