Geometric Aspects of the Dipolar Interaction in Lattices of Small Particles

Details Geometric Aspects of the Dipolar Interaction in Lattices of Small Particles Geometric Aspects of the Dipolar Interaction in Lattices of Small Particles

2004-09-14

arxiv.org/abs/cond-mat/0409374v1

Physics

Condensed Matter

Materials Science

5 pages, 7 figures

Scientific paper

10.1088/0953-8984/17/10/017

The hysteresis curves of systems composed of small interacting magnetic particles, regularly placed on stacked layers, are obtained with Monte Carlo simulations. The remanence as a function of temperature, in interacting systems, presents a peak that separates two different magnetic states. At low temperatures, small values of remanence are a consequence of antiferromagnetic order due to the dipolar interaction. At higher values of temperature the increase of the component normal to the lattice plane is responsible for the small values of remanence. The effect of the number of layers, coordination number and distance between particles are investigated.

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