Phase relationships in the CeFe8Co3Ti1-ySiy system

Abstract The phase formation behavior of the nominal CeFe 8 Co 3 Ti 1 − y Si y system is investigated for 0 ≤ y ≤ 0.6 by powder x-ray diffraction and scanning electron microscopy with energy dispersive x-ray spectroscopy for ingots formed by arc-melting then annealing at 1000 °C and quenching to room temperature. The ingots are seen to nearly single phase for y ≤ 0.4 and are multi-phase for y ≥ 0.5 though a compound of the ThMn 12 type does indeed form for all values of y . The saturation magnetizations ( M s ), Curie temperatures ( T C ), and magnetic anisotropy fields ( H a ) are measured for the y ≤ 0.4 samples and the values of M s and H a appear to be nearly identical for all y ≤ 0.4 . T C , however, is seen to increase about 20 °C in this range for increasing y .