Structural and magnetic properties of (Fe100-xCox)73.5Cu1Nb3Si13.5B9 nanocrystalline wires

Results on the production, structure and magnetic properties of (Fe100-xCox)(73.5)Cu1Nb3Si13.5B9 (x = 0, 5 10, 20) wires obtained by the in rotating water quenching technique, both in the amorphous and nanocrystalline state are reported. The obtained results are compared with that obtained for the FINEMET alloy. The saturation magnetostriction decreases when increasing the Co content in the amorphous wires and also after annealing at 550 degrees C. The relative magnetic permeability decreases with Co addition and increases after annealing at 550 degrees C. The magnetic properties of the wires are explained on the basis of the effect of annealing in correlation with the change in the value of the saturation magnetostriction, (C) 1999 Acta Metallurgica Inc.