| Numéro |
J. Phys. Colloques
Volume 49, Numéro C8, Décembre 1988
Proceedings of the International Conference on Magnetism
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|---|---|---|
| Page(s) | C8-1595 - C8-1596 | |
| DOI | https://doi.org/10.1051/jphyscol:19888730 | |
Proceedings of the International Conference on Magnetism
J. Phys. Colloques 49 (1988) C8-1595-C8-1596
DOI: 10.1051/jphyscol:19888730
Naval Research Laboratory, Washington, D.C., 20375 U.S.A.
J. Phys. Colloques 49 (1988) C8-1595-C8-1596
DOI: 10.1051/jphyscol:19888730
CHAOS IN POLISHED AND ROUGHENED YIG SPHERES
F. J. Rachford, T. L. Carroll et L. M. PecoraNaval Research Laboratory, Washington, D.C., 20375 U.S.A.
Abstract
We have studied quasi-periodic and chaotic auto-oscillations in the ferromagnetic resonance of polished and roughened YIG spheres between 2.0 and 3.6 GHz. Regions of quasi-periodicity, steady chaos, transient chaos and intermittency were maped out. The average times for transient chaos follow a scaling law in microwave power. Roughened samples show a greater variety of responses. Changes were also noted in the Fourier spectrum of chaos. The information dimension of the chaos in both types of sample was 3.3 ± 0.2.