Ground magnetic state of an assembly of single-domain particles confined in a spherical layer

The ground magnetic state of systems of finite number N of single-domain particles confined in a spherical monolayer is investigated by numeric simulations. Two model situations are considered. In the first, the particle positions are imposed and fixed, in the second, the particles are able to move...

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Published in:Journal of magnetism and magnetic materials 2009-04, Vol.321 (7), p.663-666
Main Authors: Melenev, P.V., Rusakov, V.V., Raikher, Yu.L., Perzynski, R.
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Language:English
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Composite
Magnetic nanoparticle
Microaggregate
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description The ground magnetic state of systems of finite number N of single-domain particles confined in a spherical monolayer is investigated by numeric simulations. Two model situations are considered. In the first, the particle positions are imposed and fixed, in the second, the particles are able to move freely within the layer; in the latter case the excluded volume effect is taken into account. It is found that in all the range studied ( N⩽200) the ground state of the system retains a considerable extent of magnetic vorticity (toroid moment). Moreover, the magnetic and toroid moments are correlated: they are approximately perpendicular to one another.
doi_str_mv 10.1016/j.jmmm.2008.11.020
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subjects Composite
Magnetic nanoparticle
Microaggregate
title Ground magnetic state of an assembly of single-domain particles confined in a spherical layer
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