| Numéro |
J. Phys. Colloques
Volume 49, Numéro C8, Décembre 1988
Proceedings of the International Conference on Magnetism
|
|
|---|---|---|
| Page(s) | C8-1851 - C8-1852 | |
| DOI | https://doi.org/10.1051/jphyscol:19888847 | |
Proceedings of the International Conference on Magnetism
J. Phys. Colloques 49 (1988) C8-1851-C8-1852
DOI: 10.1051/jphyscol:19888847
1 Division of Science and Technology, Griffith University, Nathan 4111, Australia
2 Department of Physics, Reading University, Reading RG6 2AH, G.B.
J. Phys. Colloques 49 (1988) C8-1851-C8-1852
DOI: 10.1051/jphyscol:19888847
LOW-FREQUENCY SUSCEPTIBILITY OF SUPERPARAMAGNETS
E. M. Gray1 et R. Cywinski21 Division of Science and Technology, Griffith University, Nathan 4111, Australia
2 Department of Physics, Reading University, Reading RG6 2AH, G.B.
Abstract
We used a log-normal distribution of activation energies to model the alternating susceptibility of a superparamagnet without interactions. Scaling relationships facilitating the calculation of measurable quantities without knowing the interdependence of particle volume, moment and anisotropy energy were found. A peaked temperature - dependent susceptibility and log - ω frequency response were obtained.