Structure and soft magnetic properties of FINEMET type alloys: Fe73.5Si13.5Nb3-xMoxB9Cu1 (x = 1.5, 2)

JOSEFINA M. SILVEYRA; JAVIER A. MOYA; VICTORIA J. CREMASCHI; DUšAN JANIčKOVIč; PETER ŠVEC

La Plata, Argentina

Conferencia; XI Latin American Conference on the Applications of the Mössbauer Effect; 2008

FINEMET type ribbons (Fe73.5Si13.5Nb3-xMoxB9Cu1, x = 1.5, 2 at. %) were produced by the planar flow casting technique and subsequently heat treated at 823 K to induce nanocrystallization and to optimize its soft magnetic properties. The coercivity, measured by conventional fluxometric method, resulted in HC = 0.53 ±0.10 and 0.41 ±0.05 A/m for x = 1.5 and 2 respectively. A correlation between magnetic properties and the amorphous and nanocrystalline phases when Nb was partially substituted with Mo was studied by means of Mössbauer spectroscopy and X-ray diffraction.