Dzyaloshinskii-Moriya interactions and magnetic texture in the Fe films deposited on transition-metal dichalcogenides

TL;DR

This study investigates how Fe films on transition-metal dichalcogenides exhibit varied magnetic properties due to Dzyaloshinskii-Moriya interactions, leading to potential skyrmion formation influenced by external magnetic fields.

Contribution

It provides first-principles calculations of DM interactions in Fe/TMDC systems and explores their impact on magnetic textures and skyrmion formation.

Findings

Strong Dzyaloshinskii-Moriya interactions observed

Large D/J ratios suggest skyrmion stability

Magnetic textures vary with external magnetic field

Abstract

The magnetic properties of materials based on two-dimensional transition-metal dichalcogenides (TMDC) have been investigated by means of first-principles DFT calculations, namely Fe-intercalated bulk Fe$_{1/4}$TaS$_2$ compounds as well as TMDC monolayers with deposited Fe films. Changing the structure and the composition of systems consisting of Fe overlayers on top of a TMDC monolayers resulted in considerable variations of their physical properties. For the considered systems the Dzyaloshinskii-Moriya (DM) interaction has been determined and used for the subsequent investigation of their magnetic structure using Monte Carlo simulations. Rather strong DM interactions as well as large $D/J$ ratios have been obtained in some of these materials, which can lead to the formation of skyrmionic structures varying with the strength of the applied external magnetic field.