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Broad distributions of relaxation times in FePt nanoparticles
Citation
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
Abstract
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 |
| Downloads: | 0 |
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