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Broad distributions of relaxation times in FePt nanoparticles


Fuller, RO and Koutsantonis, GA and Stamps, RL and Bardou, F, Broad distributions of relaxation times in FePt nanoparticles, Journal of Applied Physics, 97, (10) Article 10J508. ISSN 0021-8979 (2005) [Refereed Article]

Copyright Statement

Copyright 2005 American Institute of Physics

DOI: doi:10.1063/1.1853932


Results from magnetic viscosity experiments on chemically synthesized magnetic nanoparticles are presented. Our synthesized Fe20Pt80 particles are distinguished by a narrow size distribution but display features associated with broad distributions of activation rates. Results are presented from viscosity measurements in which the remnant magnetization is measured at different times after the removal of a static field, and studied as a function of temperature. We discuss how these results may be analyzed in terms of activation rate distributions for thermal activated reversal processes after the application and removal of a field. A method for the extraction of energy barrier distributions from directly measured time dependent data is presented.

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:153936
Year Published:2005
Web of Science® Times Cited:6
Deposited By:Chemistry
Deposited On:2022-10-17
Last Modified:2022-11-03

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