J. Phys. IV France 08 (1998) Pr2-343-Pr2-346
Magnetic interactions in melt spun CoCu systemA. González1, P. Tiberto1, 2, A. Garcia-Escorial3, D. Páramo1, J.P. Sinnecker1, P. Allia2 and A. Hernando1
1 Instituto de Magnetismo Aplicado, UCM-RENFE, Apartado de Correos 155, 28230 Las Rozas, Madrid, Spain
2 IEN Galileo Ferraris, Cso. Massimo d'Azeglio 42, 10125 Torino, Italy
3 CENIM-CSIC, 28040 Madrid, Spain
The magnetic interactions between Co clusters have been studied for the melt-spun CoxCu1-x system. Superparamagnetic character of these clusters can be verified by the superimposition of the magnetization versus H/T curves. These curves also allow us to check, by means of the molecular field approximation, that there is an antiferromagnetic like coupling between the single domain Co clusters. This molecular field, which is in fact proportional to the magnetization, could be due to dipole-dipole, as well as to RKKY like, interactions.
© EDP Sciences 1998