title: Asymmetric Hysteresis for Probing Dzyaloshinskii-Moriya Interaction.
abstract: The interfacial Dzyaloshinskii-Moriya interaction (DMI) is intimately related to the prospect of superior domain-wall dynamics and the formation of magnetic skyrmions. Although some experimental efforts have been recently proposed to quantify these interactions and the underlying physics, it is still far from trivial to address the interfacial DMI. Inspired by the reported tilt of the magnetization of the side edge of a thin film structure, we here present a quasi-static, straightforward measurement tool. By using laterally asymmetric triangular-shaped microstructures, it is demonstrated that interfacial DMI combined with an in-plane magnetic field yields a unique and significant shift in magnetic hysteresis. By systematic variation of the shape of the triangular objects combined with a droplet model for domain nucleation, a robust value for the strength and sign of interfacial DMI is obtained. This method gives immediate and quantitative access to DMI, enabling a much faster exploration of new DMI systems for future nanotechnology.
authors.affiliation: Department of Applied Physics, Center for NanoMaterials, Eindhoven University of Technology , PO Box 513, 5600 MB Eindhoven, The Netherlands.
authors.forename: Dong-Soo
authors.initials: DS
authors.lastname: Han
authors.affiliation: Department of Physics, Inha University , Incheon 22212, Republic of Korea.|Institut of Physics and Graduate School of Excellence Materials Science in Mainz, Johannes Gutenberg-Universität Mainz , 55099 Mainz, Germany.
authors.forename: Nam-Hui
authors.initials: NH
authors.lastname: Kim
authors.affiliation: Department of Applied Physics, Center for NanoMaterials, Eindhoven University of Technology , PO Box 513, 5600 MB Eindhoven, The Netherlands.
authors.forename: June-Seo
authors.initials: JS
authors.lastname: Kim
authors.affiliation: Department of Applied Physics, Center for NanoMaterials, Eindhoven University of Technology , PO Box 513, 5600 MB Eindhoven, The Netherlands.
authors.forename: Yuxiang
authors.initials: Y
authors.lastname: Yin
authors.affiliation: Department of Applied Physics, Center for NanoMaterials, Eindhoven University of Technology , PO Box 513, 5600 MB Eindhoven, The Netherlands.
authors.forename: Jung-Woo
authors.initials: JW
authors.lastname: Koo
authors.affiliation: Department of Physics, Inha University , Incheon 22212, Republic of Korea.
authors.forename: Jaehun
authors.initials: J
authors.lastname: Cho
authors.affiliation: Department of Physics, Inha University , Incheon 22212, Republic of Korea.
authors.forename: Sukmock
authors.initials: S
authors.lastname: Lee
authors.affiliation: Institut of Physics and Graduate School of Excellence Materials Science in Mainz, Johannes Gutenberg-Universität Mainz , 55099 Mainz, Germany.
authors.forename: Mathias
authors.initials: M
authors.lastname: Kläui
authors.affiliation: Department of Applied Physics, Center for NanoMaterials, Eindhoven University of Technology , PO Box 513, 5600 MB Eindhoven, The Netherlands.
authors.forename: Henk J M
authors.initials: HJ
authors.lastname: Swagten
authors.affiliation: Department of Applied Physics, Center for NanoMaterials, Eindhoven University of Technology , PO Box 513, 5600 MB Eindhoven, The Netherlands.
authors.forename: Bert
authors.initials: B
authors.lastname: Koopmans
authors.affiliation: Department of Physics, Inha University , Incheon 22212, Republic of Korea.|Department of Emerging Materials Science, DGIST , Daegu 42988, Republic of Korea.
authors.forename: Chun-Yeol
authors.initials: CY
authors.lastname: You
keywords: Dzyaloshinskii−Moriya interaction; asymmetric hysteresis loop; chiral magnet; nanomagnetism; perpendicular magnetic anisotropy; spintronics