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

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

2010-09-13

arxiv.org/abs/1009.2395v1

J. Phys.: Cond. Mat. 22, 296007 (2010)

Physics

Condensed Matter

Statistical Mechanics

10 pages, 9 figures

Scientific paper

10.1088/0953-8984/22/29/296007

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.

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