| Issue |
J. Phys. Colloques
Volume 49, Number C8, Décembre 1988
Proceedings of the International Conference on Magnetism
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|
|---|---|---|
| Page(s) | C8-1933 - C8-1934 | |
| DOI | https://doi.org/10.1051/jphyscol:19888874 | |
Proceedings of the International Conference on Magnetism
J. Phys. Colloques 49 (1988) C8-1933-C8-1934
DOI: 10.1051/jphyscol:19888874
C.N.R.S., Laboratoire de Magnétisme, 92195 Meudon, France
J. Phys. Colloques 49 (1988) C8-1933-C8-1934
DOI: 10.1051/jphyscol:19888874
INFLUENCE OF MICROSTRUCTURE ON ACOUSTIC EMISSION ALONG HYSTERESIS LOOP OF POLYCRYSTALLINE FERRIMAGNETS
M. Guyot, T. Merceron et V. CaganC.N.R.S., Laboratoire de Magnétisme, 92195 Meudon, France
Abstract
The acoustic emission AE in stoichiometric YIG samples has been investigated as a function of microstructure ; the grain size Dm ranges from 2 to 30 µm, the porosity p from 0.4 to 12 % . AE is always proportional to the hysteresis losses. AE increases with Dm and with 1/p, but Dm is the dominant parameter.