Novel methods of quantifying Dzyaloshinskii-Moriya interaction in heavy metals and ferromagnetic material heterostructures
Dong-Soo Han (Department of Applied Physics, Center for NanoMaterials, Eindhoven University of Technology, PO Box 513, 5600 MB Eindhoven)

In the field of new spin-based phenomena and novel applications such as skyrmion-based memory or logic, Dzyaloshinskii-Moriya interaction (DMI) has recently attracted growing interest due to its physical role in various intriguing phenomena in heavy metal/ferromagnetic materials. So far, several experimental ways to verify the interfacial DMI have been demonstrated. However, since these methods require specific measurement tools and/or involve the issues with the reliability of their analysis, it is still not trivial to experimentally address DMI. Here, we present the measurement of the interfacial DMI. By introducing a triangle objective, it is demonstrated that interfacial DMI combined with an in-plane magnetic field yield a unique and significant shift in magnetic hysteresis, providing a robust value for the strength and sign of interfacial DMI. This method gives immediate and quantitative access to DMI, enabling a much faster exploration of new DMI systems for future nanotechnology.