| Numéro |
J. Phys. Colloques
Volume 49, Numéro C8, Décembre 1988
Proceedings of the International Conference on Magnetism
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|
|---|---|---|
| Page(s) | C8-925 - C8-926 | |
| DOI | https://doi.org/10.1051/jphyscol:19888421 | |
Proceedings of the International Conference on Magnetism
J. Phys. Colloques 49 (1988) C8-925-C8-926
DOI: 10.1051/jphyscol:19888421
1 Department of Physics, Gakushuin University, 1-5-1 Mejiro, Toshima-ku, Tokyo 171, Japan
2 Institute of Physics, Czechoslovak Academy of Sciences, CS-180 40 Prague 8, Czechoslovakia.
3 Department of Physics, Eindhoven University of Technology, NL-5600 MB Eindhoven, The Netherlands.
J. Phys. Colloques 49 (1988) C8-925-C8-926
DOI: 10.1051/jphyscol:19888421
MAGNETIC AND ACOUSTIC RELAXATIONS IN Mn-FERRITES
Y. Kawai1, Z. Simsa2 et V. A. M. Brabers31 Department of Physics, Gakushuin University, 1-5-1 Mejiro, Toshima-ku, Tokyo 171, Japan
2 Institute of Physics, Czechoslovak Academy of Sciences, CS-180 40 Prague 8, Czechoslovakia.
3 Department of Physics, Eindhoven University of Technology, NL-5600 MB Eindhoven, The Netherlands.
Abstract
Magnetic and acoustic losses were measured in single-crystal manganese ferrites at temperatures 80 ÷ 630 K. Relaxation peaks at 230 and 540 K were observed with activation energies of 0.27 ÷ 0.42 and 0.64 ÷ 0.82 eV, respectively. Both peaks are influenced by heat-treatments resulting in different degrees of inversion and vacancy distributions.