# Magnetic properties of the finite-length biatomic chains in the framework of the single domain-wall approximation

## TL;DR

This paper introduces a simple analytical method to study the magnetic properties and magnetization reversal times of finite-length biatomic chains within the Heisenberg model, aligning well with kinetic Monte Carlo results.

## Contribution

The paper presents a novel analytical approach for estimating magnetization reversal times in biatomic chains, reducing computational effort compared to traditional simulations.

## Key findings

- Method agrees with kinetic Monte Carlo simulations.
- Applicable to Fe and Co biatomic chains on specific surfaces.
- Significantly less time-consuming than standard simulations.

## Abstract

A simple analytical method for study the magnetic properties of the finite-length biatomic chains in the framework of Heisenberg model with uniaxial magnetic anisotropy is proposed. The method allows to estimate the reversal time of the magnetization of ferromagnetic and antiferromagnetic biatomic chains. Three cases are considered: the spontaneous remagnetization, the remagnetization under the interaction with a scanning tunneling microscope, and the remagnetization in the external magnetic field. The applicability limits of the method are discussed. Within its limits of applicability the method gives results which are in perfect agreement with the results of the kinetic Monte Carlo simulations. As the examples, two physical systems are considered: biatomic Fe chains on Cu2N/Cu(001) surface and biatomic Co chains on Pt(997) surface. The presented method is incomparably less time-consuming than the standard kMC simulations, especially in the cases of low temperatures or long chains.