Deposition of magnetic particles: A computer simulation study

TL;DR

This study uses Monte Carlo simulations to analyze how magnetic particles deposit on a one-dimensional substrate, revealing temperature effects on deposit structure and dipole alignment.

Contribution

It introduces a simulation approach to study magnetic particle deposition considering dipole interactions and temperature effects, highlighting a temperature-dependent crossover in behavior.

Findings

Fractal dimension remains unchanged with temperature.

A crossover from temperature-dependent to universal behavior occurs.

Dipoles tend to align with local growth direction.

Abstract

We report a Monte Carlo simulation of deposition of magnetic particles on a one-dimensional substrate. Incoming particles interact with those that are already part of the deposit via a dipole-dipole potential. The strength of the dipolar interaction is controlled by an effective temperature $T^*$, the case of pure diffusion-limited deposition being recovered in the limit $T^*\to\infty$. Preliminary results suggest that the fractal dimension of the deposits does not change with temperature but that there is a (temperature-dependent) cross-over from regimes of temperature-dependent to universal behaviour. Furthermore, it was found that dipoles tend to align with the local direction of growth.