INFLUENCE OF THE PREPARATION CONDITIONS ON THE MAGNETIC-PROPERTIES AND ELECTRICAL-RESISTIVITY OF FE73.5NB3CU1SI13.5B9 NANOCRYSTALLINE ALLOYS

We present the magnetic properties and the resistivity values of a series of Fe73.5Nb3Cu1Si13.5B9 alloys quenched from different melting temperatures and using different spin velocities. Some nanocrystals with a strong preferred orientation can be obtained directly from the melt at low velocities. Such partially crystalline samples show a lower room-temperature magnetostriction and resistivity than the amorphous ones. They also show a retardation in the nanocrystallization process, but the magnetic properties are poorer than those of the high-velocity samples, both in the as-quenched state and after complete nanocrystallization.