Magnetic viscosity in Nd60Fe30Al10 amorphous alloys

O.V. BILLONI, M. VILLAFUERTE, S. URRETA, L.M. FABIETTI

PHYSICA B - CONDENSED MATTER

Año: 2002 p. 288 - 290

0921-4526

Ferromagnetic amorphous Nd60Fe30Al10 alloys melt spun at wheel speeds between 5 and 20 m/s exhibit hard magnetic properties, which are found to be very sensitive to the cooling conditions. The magnetization reversion mechanisms leading to the rather high coercive forces found are investigated by thermally activated magnetic relaxation experiments; the mean fluctuation field and the activation volume are measured—in specimens cooled at differentrates—at the critical field for extensive magnetization reversion. These preliminary results show a qualitative agreementwith the predictions of a ferromagnetic cluster model.