Asymmetric spin-wave dispersion on Fe(110): direct evidence of the Dzyaloshinskii-Moriya interaction.
The influence of the Dzyaloshinskii-Moriya interaction on the spin-wave dispersion in an Fe double layer grown on W(110) is measured for the first time. It is demonstrated that the Dzyaloshinskii-Moriya interaction breaks the degeneracy of spin waves and leads to an asymmetric spin-wave dispersion relation. An extended Heisenberg spin Hamiltonian is employed to obtain the longitudinal component of the Dzyaloshinskii-Moriya vectors from the experimentally measured energy asymmetry.
Zakeri
Kh
Kh
Max-Planck-Institut für Mikrostrukturphysik, Weinberg 2, 06120 Halle, Germany. zakeri@mpi-halle.de
Zhang
Y
Y
Prokop
J
J
Chuang
T-H
TH
Sakr
N
N
Tang
W X
WX
Kirschner
J
J