MAGNETIC-PROPERTIES OF AMORPHOUS FERROMAGNET FE78MO2B20

Low-field magnetic susceptibility and the magnetic field dependence of magnetization of Metglas 2605 A (Fe78Mo2B20) were studied between 300 and 600 K and in fields up to 10kG. It is shown here that for an amorphous ferromagnetic alloy, the various methods of determination of Curie temperature Tc give the same value, which in this case is (564 ± 1) K. The critical exponent γ is 1.7 ± 0.1. Our low-field susceptibility measurements on Metglas 2605 (Fe80B20) gives a Tc of (634 ± 3) K while the reported high-field method value is 647 K. These results are discussed in terms of crystallization temperatures. © 1979.