Magnetic properties in the system Iron-Cobalt-Aluminum

The ternary alloy system Fe-Co-Al is studied in the body-centered cubic (bcc) phase for the composition dependence of room temperature magnetization, saturation induction, and Curie temperature T
c
. The system has potential for high temperature application as soft magnetic material. The results expand upon earlier measurements. The presence of a broad maximum in magnetization near the composition 70 Fe-30 Co (weight percent) in their binary does not persist beyond about 5 wt% Al in the ternary family. Previously reported Curie temperature results are confirmed including an anomalous increase of T
c
with Al dilution for a certain range of composition. This feature is explained as due to a stabilization of the α-phase to higher temperatures.