Magnetic properties of rapidly quenched Fe100-xSix (15 < x < 34) alloys

This paper reports on the magnetic data of Fe100-xSix (15 < x < 34) alloys obtained by rapid quenching from the melt, complementing the data in the literature existing for low silicon content (x < 25). The X-ray diffraction experiments shows that the basically cubic structure change from DO3 structures below 25 at.% Si to B2 structure around x = 33. The thermomagnetic curves show a single ferro-paramagnetic transition on hearing in the whole concentration range. Our saturation magnetization and Curie temperature data for high Si contents represent an extension of low Si content data up to 33 at.% when ee could successfully prepare these alloys with cubic structure. The spin wave stiffness versus Curie temperature relation is approximately linens lip to x = 37.5 at.8% Si. The soft magnetic metastable, nanocrystalline Fe67Si33 ribbon with M-s = 0.6T and a large resistivity of 200 mu Ohm cm is a hopeful candidate for powder core applications at high frequencies. (C) 2001 Elsevier Science B.V. All rights reserved.