MAGNETIC-PROPERTIES OF SI RICH FE100-XSIX RAPIDLY QUENCHED ALLOYS

Crystalline Fe100-xSix (x = 12.1, 13.8, 20.0) ribbons were produced by a rapid quenching technique. For Fe80Si20, with increasing temperatur e, the AC-susceptibility increases and the coercivity and magnetostric tion decrease, monotonically. However, for lower Si contents the tempe rature dependence of the susceptibility as well as of the coercivity a nd magnetostriction show humps at a temperature below 500 degrees C. T his behaviour is explained by assuming that for Fe87.9Si12.1 and Fe87. 9Si13.8 a simultaneous formation of the DO3 as well as of the B2 struc tures is possible. (C) 1998 Elsevier Science B.V. All rights reserved.