nl5b02732_si_001.pdf (1.33 MB)
All-Electrical Measurement of Interfacial Dzyaloshinskii-Moriya Interaction Using Collective Spin-Wave Dynamics
journal contribution
posted on 2016-01-13, 00:00 authored by Jong Min Lee, Chaun Jang, Byoung-Chul Min, Seo-Won Lee, Kyung-Jin Lee, Joonyeon ChangDzyaloshinskii-Moriya interaction
(DMI), which arises from the broken inversion symmetry and spin–orbit
coupling, is of prime interest as it leads to a stabilization of chiral
magnetic order and provides an efficient manipulation of magnetic
nanostructures. Here, we report all-electrical measurement of DMI
using propagating spin wave spectroscopy based on the collective spin
wave with a well-defined wave vector. We observe a substantial frequency
shift of spin waves depending on the spin chirality in Pt/Co/MgO structures.
After subtracting the contribution from other sources to the frequency
shift, it is possible to quantify the DMI energy in Pt/Co/MgO systems.
The result reveals that the DMI in Pt/Co/MgO originates from the interfaces,
and the sign of DMI corresponds to the inversion asymmetry of the
film structures. The electrical excitation and detection of spin waves
and the influence of interfacial DMI on the collective spin-wave dynamics
will pave the way to the emerging field of spin-wave logic devices.