Rakshit, R. K. ; Budhani, R. C. (2006) Magnetic relaxation and superparamagnetism in non-interacting, disordered CoPt nanoparticles Journal of Physics D: Applied Physics, 39 (9). pp. 1743-1748. ISSN 0022-3727
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Official URL: http://iopscience.iop.org/0022-3727/39/9/006
Related URL: http://dx.doi.org/10.1088/0022-3727/39/9/006
Abstract
Nanoparticles of a cobalt-platinum (CoPt) alloy near equiatomic composition, dispersed in a surfactant-polymer matrix, are synthesized using aqueous phase laser ablation. The magnetization dynamics of these particles is examined in the framework of the superparamagnetic blocking phenomenon based on a log-normal size distribution. Our analysis reveals, in accordance with electron microscopy results, two size distributions which peak at 1.3 and 5.9 nm. The magnetic anisotropy energy of these particles is 0.9 × 106 J m-3 and 0.1 × 106 J m-3, respectively.
| Item Type: | Article |
|---|---|
| Source: | Copyright of this article belongs to Institute of Physics. |
| ID Code: | 87786 |
| Deposited On: | 22 Mar 2012 07:47 |
| Last Modified: | 22 Mar 2012 07:47 |
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