Thermal effects of moderate substitutions of cobalt for iron in Fe76Pr16B8

Abstract
We have explored the thermal effects of moderate substitutions of cobalt for iron in rapidly solidified, microcrystalline alloys of composition (Fe100−xCox)76Pr16B8, where x=0, 5, 10, 20, and 30. The maximum intrinsic coercivities were about 20 kOe and the saturation magnetizations were about 88 emu/g, both independent of cobalt content. A significant improvement in the Curie temperature of the hard phase is obtained with increasing cobalt content. A similar improvement in the reversible and irreversible temperature behavior is also observed as the cobalt content is increased.