Micromagnetic simulations of interacting dipoles on a fcc lattice: Application to nanoparticle assemblies

Abstract

Micromagnetic simulations are used to examine the effects of cubic and axial anisotropy, magnetostatic interactions and temperature on M-H loops for a collection of magnetic dipoles on fcc and sc lattices. We employ a simple model of interacting dipoles that represent single-domain particles in an attempt to explain recent experimental data on ordered arrays of magnetoferritin nanoparticles that demonstrate the crucial role of interactions between particles in a fcc lattice. Significant agreement between the simulation and experimental results is achieved, and the impact of intra-particle degrees of freedom and surface effects on thermal fluctuations are investigated.

arXiv comment10 pages, 9 figures

References in corpus (6)

• Surface effects in nanoparticles: application to maghemite $\gamma$-Fe_{2}O_{3}
• Tunable dipolar magnetism in high-spin molecular clusters
• Effect of dipolar interactions on the magnetization of a cubic array of nanomagnets
• Geometric Aspects of the Dipolar Interaction in Lattices of Small Particles
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Cited by in corpus (7)

• Room-temperature multiferroic hexagonal LuFeO${}_3$ films
• Dipolar ferromagnetism in three-dimensional superlattices of nanoparticles
• Atomic level micromagnetic model of recording media switching at elevated temperatures
• Micromagnetic simulations of sweep-rate dependent coercivity in perpendicular recording media
• Coarse-graining in micromagnetic simulations of dynamic hysteresis loops
• Multiscale modelling of magnetostatic effects on magnetic nanoparticles with application to hyperthermia
• Monte Carlo Study of Maghemite Nanoparticles