Critical dynamics of an interacting magnetic nanoparticle system
- 2 May 2002
- journal article
- Published by IOP Publishing in Journal of Physics: Condensed Matter
- Vol. 14 (19) , 4901-4914
- https://doi.org/10.1088/0953-8984/14/19/314
Abstract
Effects of dipole-dipole interactions on the magnetic relaxation have been investigated for three Fe-C nanoparticle samples with volume concentrations of 0.06, 5 and 17 vol%. While both the 5 and 17 vol% samples exhibit collective behaviour due to dipolar interactions, only the 17 vol% sample displays critical behaviour close to its transition temperature. The behaviour of the 5 vol% sample can be attributed to a mixture of collective and single-particle dynamics.Keywords
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