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An experimental investigation of dynamic behavior in FePt systems

Citation

Fuller, RO and Koutsantonis, GA and Stamps, RL, An experimental investigation of dynamic behavior in FePt systems, Journal of Physics: Condensed Matter, 21, (12) Article 124203. ISSN 0953-8984 (2009) [Refereed Article]

Copyright Statement

2009 IOP Publishing Ltd

DOI: doi:10.1088/0953-8984/21/12/124203

Abstract

Magnetic relaxation experiments have been used to investigate the non-equilibrium dynamics of FePt nanoparticles. The system exhibits ageing at low temperatures, as well as a narrow energy distribution of the barrier to reversal. These properties were found susceptible to being affected by particle size, matrix and applied field strength. An analysis based on broad rate distributions is presented and compared with results obtained using energy barrier and viscosity interpretations. We find that a single broad distribution of relaxation times suggestive of cooperative effects is sufficient to explain the experimental results.

Item Details

Item Type:Refereed Article
Keywords:FePt, nanoparticles, magnetic relaxation, iron platinum
Research Division:Chemical Sciences
Research Group:Macromolecular and materials chemistry
Research Field:Nanochemistry
Objective Division:Expanding Knowledge
Objective Group:Expanding knowledge
Objective Field:Expanding knowledge in the chemical sciences
UTAS Author:Fuller, RO (Dr Rebecca Fuller)
ID Code:153934
Year Published:2009
Web of Science® Times Cited:3
Deposited By:Chemistry
Deposited On:2022-10-17
Last Modified:2022-11-17
Downloads:0

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