Diffusion-limited deposition of dipolar particles

TL;DR

This paper uses Monte Carlo simulations to study how dipolar interactions influence particle deposition, revealing a tunable initial ordered regime and a universal later stage dominated by thermal effects.

Contribution

It introduces a detailed analysis of the crossover from dipolar to thermal regimes in dipolar particle deposition, highlighting the tunability of magnetic properties.

Findings

Initial non-universal ordered deposits depend on interaction strength

Cluster geometry and order are tunable via growth conditions

Crossover size increases exponentially as temperature decreases

Abstract

Deposits of dipolar particles are investigated by means of extensive Monte Carlo simulations. We found that the effect of the interactions is described by an initial, non-universal, scaling regime characterized by orientationally ordered deposits. In the dipolar regime, the order and geometry of the clusters depend on the strength of the interactions and the magnetic properties are tunable by controlling the growth conditions. At later stages, the growth is dominated by thermal effects and the diffusion-limited universal regime obtains, at finite temperatures. At low temperatures the crossover size increases exponentially as T decreases and at T=0 only the dipolar regime is observed.