# The determination of the Dzyaloshinskii-Moriya interaction in exchange biased Au/Co/NiO system

## TL;DR

This paper presents a new experimental method to measure the Dzyaloshinskii-Moriya interaction in exchange biased layered magnetic systems using a standard magnetometer, revealing a strong negative interaction in Au/Co/NiO films.

## Contribution

The authors adapted an existing method to measure Dzyaloshinskii-Moriya interaction in exchange biased systems with conventional equipment, demonstrating its effectiveness in Au/Co/NiO.

## Key findings

- Au/Co/NiO exhibits a strong negative Dzyaloshinskii-Moriya interaction.
- The interaction's sign is unaffected by the exchange bias direction.
- The method simplifies the measurement process for such interactions.

## Abstract

The determination of the interfacial Dzyaloshinskii-Moriya interaction for perpendicularly magnetized thin layered films is not trivial and therefore needs some experimental efforts to determine its sign and magnitude, especially in the exchange biased system. Here, we developed a method proposed by D.-S. Han et al. [Nano Lett. 16, (2016) 4438], which opens a way to investigate this interaction using a conventional PMOKE magnetometer, also in exchange biased systems. Using our approach we demonstrated that the Au/Co/NiO layered system has a strong negative Dzyaloshinskii-Moriya interaction, which is independent of the direction of perpendicular interlayer exchange bias coupling.