Temperature dependence of magnetization of amorphous Fe-B-C alloys

Temperature and magnetic field dependence of amorphous Fe-B-C alloys obtained by splat cooling were measured and compared with those of Fe-B alloys. It was found that the effect of replacing boron by carbon in Fe86B14 alloy was to change significantly the temperature dependence of magnetization in the direction of increasing spin-wave stiffness, and to reduce the saturation susceptibility. The high value of room temperature saturation induction found in Fe-B-C alloy is therefore attributed to a change in the temperature dependence of magnetization, rather than to change in the magnetic moment at 0 K.