Magnetic relaxation of iron nanoparticles

Ralph Chamberlin, Keith D. Humfeld, Dorothy Farrell, Saeki Yamamuro, Yumi Ijiri, Sara A. Majetich

Research output: Contribution to journalArticlepeer-review

29 Scopus citations


The magnetic relaxation of highly diluted monodisperse iron-based particles was measured between 10 -5 and 10 4s, for different temperatures and particle sizes. The decay over a very broad range of times indicated a distribution of energy barriers remained despite the narrow range of sizes. Many features of this decay could be explained using a percolation model of particles with weak dipolar interactions. However, this model did not predict the abrupt change in the decay rate at long times, which was observed for samples of both 8.0 and 5.5 nm particles below a threshold temperature.

Original languageEnglish (US)
Pages (from-to)6961-6963
Number of pages3
JournalJournal of Applied Physics
Issue number10 I
StatePublished - May 15 2002

ASJC Scopus subject areas

  • Physics and Astronomy(all)


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