title: Direct observation of the Dzyaloshinskii-Moriya interaction in a Pt/Co/Ni film.
abstract: The interfacial Dzyaloshinskii-Moriya interaction in an in-plane anisotropic Pt(4  nm)/Co(1.6  nm)/Ni(1.6  nm) film has been directly observed by Brillouin spectroscopy. It is manifested as the asymmetry of the measured magnon dispersion relation, from which the Dzyaloshinskii-Moriya interaction constant has been evaluated. Linewidth measurements reveal that the lifetime of the magnons is asymmetric with respect to their counter-propagating directions. The lifetime asymmetry is dependent on the magnon frequency, being more pronounced, the higher the frequency. Analytical calculations of the magnon dispersion relation and linewidth agree well with experiments.
authors: Department of Physics, National University of Singapore, Singapore 117551, Singapore.
authors: Kai
authors: K
authors: Di
authors: Department of Physics, National University of Singapore, Singapore 117551, Singapore.
authors: Vanessa Li
authors: VL
authors: Zhang
authors: Department of Physics, National University of Singapore, Singapore 117551, Singapore.
authors: Hock Siah
authors: HS
authors: Lim
authors: Department of Physics, National University of Singapore, Singapore 117551, Singapore.
authors: Ser Choon
authors: SC
authors: Ng
authors: Department of Physics, National University of Singapore, Singapore 117551, Singapore.
authors: Meng Hau
authors: MH
authors: Kuok
authors: Department of Electrical and Computer Engineering, National University of Singapore, Singapore 117576, Singapore.
authors: Jiawei
authors: J
authors: Yu
authors: Department of Electrical and Computer Engineering, National University of Singapore, Singapore 117576, Singapore.
authors: Jungbum
authors: J
authors: Yoon
authors: Department of Electrical and Computer Engineering, National University of Singapore, Singapore 117576, Singapore.
authors: Xuepeng
authors: X
authors: Qiu
authors: Department of Electrical and Computer Engineering, National University of Singapore, Singapore 117576, Singapore.
authors: Hyunsoo
authors: H
authors: Yang