An improved kinetic Monte Carlo model for computational and analytical investigations of the magnetic properties of finite-size atomic chains

TL;DR

This paper introduces two enhanced kinetic Monte Carlo models that account for noncollinear magnetic moments, enabling more accurate analysis of magnetic behaviors in finite atomic chains through both simulations and analytical methods.

Contribution

The paper presents novel kinetic Monte Carlo models that incorporate noncollinearity of magnetic moments, improving the analysis of magnetic properties in finite atomic chains.

Findings

Models successfully simulate remagnetization of Co and Fe chains.

Single domain-wall approximation effectively estimates magnetization reversal time.

Models outperform simple kMC in accuracy and analytical utility.

Abstract

Two improved kMC models for investigations of the magnetic properties of finite-size atomic chains are presented. These models take the possible noncollinearity of magnetic moments into account. The spontaneous remagnetization of ferromagnetic Co chains on Pt(997) surface and antiferromagnetic Fe chains on $\text{Cu}_2\text{N/Cu(001)}$ surface is investigated in the framework of our models. The results are compared with the results of the simple kMC model. It is also shown that a single domain-wall approximation can be successfully used to estimation of the reversal time of the magnetization. Therefore, the improved kMC models can be used for analytical calculations as well as for computer simulations.