title: All-Electrical Measurement of Interfacial Dzyaloshinskii-Moriya Interaction Using Collective Spin-Wave Dynamics.
abstract: Dzyaloshinskii-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.
authors.affiliation: Center for Spintronics, Korea Institute of Science and Technology , Seoul 136-791, Korea.
authors.forename: Jong Min
authors.initials: JM
authors.lastname: Lee
authors.affiliation: Center for Spintronics, Korea Institute of Science and Technology , Seoul 136-791, Korea.
authors.forename: Chaun
authors.initials: C
authors.lastname: Jang
authors.affiliation: Center for Spintronics, Korea Institute of Science and Technology , Seoul 136-791, Korea.
authors.forename: Byoung-Chul
authors.initials: BC
authors.lastname: Min
authors.affiliation: Department of Materials Science and Engineering and KU-KIST Graduate School of Converging Science and Technology, Korea University , Seoul 136-701, Korea.
authors.forename: Seo-Won
authors.initials: SW
authors.lastname: Lee
authors.affiliation: Department of Materials Science and Engineering and KU-KIST Graduate School of Converging Science and Technology, Korea University , Seoul 136-701, Korea.
authors.forename: Kyung-Jin
authors.initials: KJ
authors.lastname: Lee
authors.affiliation: Center for Spintronics, Korea Institute of Science and Technology , Seoul 136-791, Korea.
authors.forename: Joonyeon
authors.initials: J
authors.lastname: Chang
keywords: Dzyaloshinskii-Moriya interaction; chiral magnet; magnetic thin film; propagating spin wave spectroscopy; spin wave; spintronics