| Numéro |
J. Phys. Colloques
Volume 49, Numéro C8, Décembre 1988
Proceedings of the International Conference on Magnetism
|
|
|---|---|---|
| Page(s) | C8-1323 - C8-1324 | |
| DOI | https://doi.org/10.1051/jphyscol:19888604 | |
Proceedings of the International Conference on Magnetism
J. Phys. Colloques 49 (1988) C8-1323-C8-1324
DOI: 10.1051/jphyscol:19888604
1 Istituto Elettrotecnico Nazionale Galileo Ferraris, GNSM/CISM, Torino, Italy
2 Aeritalia SpA, Torino, Italy
3 Dip. di Fisica, Politecnico di Torino, GNSM/CISM, Torino, Italy
J. Phys. Colloques 49 (1988) C8-1323-C8-1324
DOI: 10.1051/jphyscol:19888604
BLOCH WALL DYNAMIC INSTABILITY AND WALL MULTIPLICATION IN AMORPHOUS RIBBONS OF METGLAS 2605 SC
C. Beatrice1, F. Vinai1, G. Garra2 et P. Mazzetti31 Istituto Elettrotecnico Nazionale Galileo Ferraris, GNSM/CISM, Torino, Italy
2 Aeritalia SpA, Torino, Italy
3 Dip. di Fisica, Politecnico di Torino, GNSM/CISM, Torino, Italy
Abstract
The theoretical results concerning the calculation of the critical speed at which a Bloch wall becomes unstable under the action of a driving field and the eddy currents field are compared with the experimental ones obtained on a strip of Metglas 2605 SC characterized by a well defined structure of antiparallel domains. A good agreement is obtained by assuming a value of 0.97 x 10-3 J/m2 for the wall surface energy γ0. This method, which is based on direct experimental results, seems to be a simple and reliable way to obtain rather accurate values of γ0 in amorphous alloys.