%0 Journal Article
%A Tarnavich, V. V.
%A Lott, D.
%A Mattauch, S.
%A Oleshkevych, A.
%A Kapaklis, V.
%A Grigoriev, S. V.
%T Field-induced chirality in the helix structure of Ho/Y multilayers
%J Physical review / B
%V 89
%N 5
%@ 1098-0121
%C Woodbury, NY
%I Inst.
%M FZJ-2016-07225
%P 054406
%D 2014
%X We study the net chirality in the spin helix structure of Ho/Y multilayers induced by an in-plane applied magnetic field. The lifting of degeneracy of the chiral symmetry was revealed by means of polarized neutron reflectometry. Three samples of different thicknesses of the Ho and Y layers were grown by molecular-beam epitaxy. The chiral states are degenerated upon zero field cooling below the critical temperature TN=115±3 K. The chirality parameter γ rises during the field cooling procedure in the field range from 0 to 1 T and saturates at a value of 0.12±0.01. The chirality appears stepwise below TN and depends weakly on temperature. The phenomenon is interpreted in terms of the Dzyaloshinskii-Moriya interaction appearing at the interface between the Ho and Y layers.
%F PUB:(DE-HGF)16
%9 Journal Article
%U <Go to ISI:>//WOS:000332374300002
%R 10.1103/PhysRevB.89.054406
%U https://juser.fz-juelich.de/record/824662