Controllable magnetic domains in twisted trilayer magnets

TL;DR

This paper presents a theoretical model for twisted trilayer magnets, revealing complex magnetic domain structures influenced by moiré patterns, which can be controlled via twist angles and magnetic fields for potential spintronics applications.

Contribution

It introduces a novel theoretical framework for understanding magnetic structures in twisted trilayer magnets, highlighting the effects of interlayer couplings and external fields.

Findings

Rich magnetic domain structures stabilized by interlayer couplings.

Magnetic domains can be manipulated by adjusting twist angles.

External magnetic fields enable easy control of domain configurations.

Abstract

The use of moir\'e patterns to manipulate two-dimensional materials has facilitated new possibilities for controlling material properties. The moir\'e patterns in the two-dimensional magnets can cause peculiar spin texture, as shown by previous studies focused on twisted bilayer systems. In our study, we develop a theoretical model to investigate the magnetic structure of twisted trilayer magnets. Unlike the twisted bilayer, the twisted trilayer magnet has four different local stacking structures distinguished by the interlayer couplings between the three layers. Our results show that the complex interlayer coupling effects in the moir\'e superlattice can lead to the stabilization of rich magnetic domain structures; these structures can be significantly manipulated by adjusting the twist angle. Additionally, external magnetic fields can easily manipulate these domain structures, indicating potential applications in spintronics devices.