Shape and surface anisotropy effects on the hysteresis of ferrimagnetic nanoparticles

Details Shape and surface anisotropy effects on the hysteresis of ferrimagnetic nanoparticles Shape and surface anisotropy effects on the hysteresis of ferrimagnetic nanoparticles

2003-04-15

arxiv.org/abs/cond-mat/0304330v1

J. Magn. Magn. Mater. 272-276, 685 (2004)

Physics

Condensed Matter

Materials Science

2 pages, 2 figures, ICM 2003 in Rome

Scientific paper

10.1016/j.jmmm.2003.12.1361

We present the results of Monte Carlo simulations of a model of a single maghemite ferrimagnetic nanoparticle with the aim to clarify the role played by the increased anisotropy at the surface and by the shape (spherical or elliptical) of the particle on the magnetization processes at low temperatures. The formation of hedgehog-like structures for high enough surface anisotropy is responsible for a change in the reversal mechanism of the particles.

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