| Issue |
J. Phys. Colloques
Volume 49, Number C8, Décembre 1988
Proceedings of the International Conference on Magnetism
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|
|---|---|---|
| Page(s) | C8-1967 - C8-1968 | |
| DOI | https://doi.org/10.1051/jphyscol:19888891 | |
Proceedings of the International Conference on Magnetism
J. Phys. Colloques 49 (1988) C8-1967-C8-1968
DOI: 10.1051/jphyscol:19888891
Philips Research Laboratories, P.O. Box 80.000, 5600 JA Eindhoven, The Netherlands
J. Phys. Colloques 49 (1988) C8-1967-C8-1968
DOI: 10.1051/jphyscol:19888891
FERROMAGNETISM AND SMALL GRAINS
H. J. de Wit, F. W. A. Dirne et C. H. M. WitmerPhilips Research Laboratories, P.O. Box 80.000, 5600 JA Eindhoven, The Netherlands
Abstract
The rotational permeability µrot has been calculated as a function of grain size d for a model representing a fine-grained crystalline material in which the easy direction of the magnetization varies from grain to grain. If d increases from zero to the domain wall thickness δ, µrot decreases to ≈ 20 % of µrot at d = 0. If magnetostatic effects are also taken into account, the decrease of µrot shifts to higher d.