Critical dynamics of an interacting magnetic nanoparticle system

Mikkel Fougt Hansen, P.E. Jonsson, P. Nordblad, P. Svedlindh

Research output: Contribution to journalJournal articleResearchpeer-review


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.
Original languageEnglish
JournalJournal of Physics Condensed Matter
Issue number19
Pages (from-to)4901-4914
Publication statusPublished - 2002


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