TY  - JOUR
AU  - Tarnavich, V. V.
AU  - Lott, D.
AU  - Mattauch, S.
AU  - Oleshkevych, A.
AU  - Kapaklis, V.
AU  - Grigoriev, S. V.
TI  - Field-induced chirality in the helix structure of Ho/Y multilayers
JO  - Physical review / B
VL  - 89
IS  - 5
SN  - 1098-0121
CY  - Woodbury, NY
PB  - Inst.
M1  - FZJ-2016-07225
SP  - 054406
PY  - 2014
AB  - 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.
LB  - PUB:(DE-HGF)16
UR  - <Go to ISI:>//WOS:000332374300002
DO  - DOI:10.1103/PhysRevB.89.054406
UR  - https://juser.fz-juelich.de/record/824662
ER  -