# Effects of spatially engineered Dzyaloshinskii-Moriya interaction in ferromagnetic films

## TL;DR

This paper theoretically investigates how spatial variations in Dzyaloshinskii-Moriya interaction (DMI) influence magnetic states in thin ferromagnetic films, revealing phenomena that enable advanced magnetic device design.

## Contribution

It uncovers the effects of spatially engineered DMI on magnetic textures, including domain wall confinement and skyrmion control, offering new avenues for magnetic memory and magnonic applications.

## Key findings

- Equilibrium spin canting at DMI interfaces
- Strong confinement of domain walls and skyrmions
- Potential for tailored magnetic device functionalities

## Abstract

The Dzyaloshinskii-Moriya interaction (DMI) is a chiral interaction that favors formation of domain walls. Recent experiments and ab initio calculations show that there are multiple ways to modify the strength of the interfacially induced DMI in thin ferromagnetic films with perpendicular magnetic anisotropy. In this paper we reveal theoretically the effects of spatially varied DMI on the magnetic state in thin films. In such heterochiral 2D structures we report several emergent phenomena, ranging from the equilibrium spin canting at the interface between regions with different DMI, over particularly strong confinement of domain walls and skyrmions within high-DMI tracks, to advanced applications such as domain tailoring nearly at will, design of magnonic waveguides, and much improved skyrmion racetrack memory.