Asymmetric Hysteresis for Probing Dzyaloshinskii–Moriya Interaction

详细信息    查看全文

• 作者：Dong-Soo Han ; Nam-Hui Kim ; June-Seo Kim ; Yuxiang Yin ; Jung-Woo Koo ; Jaehun Cho ; Sukmock Lee ; Mathias Kläui ; Henk J. M. Swagten ; Bert Koopmans ; Chun-Yeol You
• 刊名：Nano Letters
• 出版年：2016
• 出版时间：July 13, 2016
• 年：2016
• 卷：16
• 期：7
• 页码：4438-4446
• 全文大小：567K
• 年卷期：0
• ISSN：1530-6992

文摘

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.