Numerical calculations of magnetic properties of nanostructures

TL;DR

This paper presents a numerical model and supercomputer simulations to analyze magnetic properties of nanostructures, aligning well with experimental microscopy data and enabling detailed magnetization distribution studies.

Contribution

Developed a parallel supercomputer software package for simulating magnetic properties of nanostructures based on pixel data from microscopy images.

Findings

Temperature dependence of magnetization was defined.

Magnetic hysteresis curves were calculated.

Simulation results matched experimental data well.

Abstract

Magnetic force microscopy and scanning tunneling microscopy data could be used to test computer numerical models of magnetism. The elaborated numerical model of a face-centered lattice Ising spins is based on pixel distribution in the image of magnetic nanostructures obtained by using scanning microscope. Monte Carlo simulation of the magnetic structure model allowed defining the temperature dependence of magnetization; calculating magnetic hysteresis curves and distribution of magnetization on the surface of submonolayer and monolayer nanofilms of cobalt, depending on the experimental conditions. Our developed package of supercomputer parallel software destined for a numerical simulation of the magnetic-force experiments and allows obtaining the distribution of magnetization in one-dimensional arrays of nanodots and on their basis. There has been determined interpretation of magneto-force microscopy images of magnetic nanodots states. The results of supercomputer simulations and numerical calculations are in the good compliance with experimental data.