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Issue 13, 2013
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Cluster formation in systems of shifted-dipole particles

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Abstract

In this contribution we present computer simulation results on the cluster structures in systems, made of particles, with magnetic dipole moment shifted out from the centre of mass towards the particles' surface. This additionally introduced anisotropy in the system strongly affects the topology of clusters at both low and finite temperatures. In the ground state in the intermediate dipolar shift range the dimensionality plays a role due to possibilities for decreasing the inter-dipolar distance. For larger shifts, the dimensionality of the system practically does not influence the ground state energy, but the clusters can still differ in Q2D and 3D. It turns out that at finite temperature the average cluster size changes nonmonotonously with increase in the dipolar moment shift both in quasi 2D and 3D: it first increases, but when the dipolar moment is shifted by more than 50% from the centre, the cluster size starts decreasing fast and reaches unity. We show that our model in a medium range of shift values reproduces some of the cluster structures which are experimentally observed in [Baraban et al., Phys. Rev. E: Stat., Nonlinear, Soft Matter Phys., 2008, 77].

Graphical abstract: Cluster formation in systems of shifted-dipole particles

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Article information


Submitted
04 Oct 2012
Accepted
03 Jan 2013
First published
18 Feb 2013

Soft Matter, 2013,9, 3535-3546
Article type
Paper

Cluster formation in systems of shifted-dipole particles

M. Klinkigt, R. Weeber, S. Kantorovich and C. Holm, Soft Matter, 2013, 9, 3535
DOI: 10.1039/C2SM27290C

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