Magnetic Properties of (Fe, Co)1.67Ge and (Fe, Ni)1.67Ge

Effects of substitution of Fe and Ni or Co in the Pauli-paramagnetic compounds Co 1.67 Ge and Ni 1.67 Ge were investigated on (Fe, Co) 1.67 Ge and (Fe, Ni) 1.67 Ge. Substitution of Fe for Co in Co 1.67 Ge increases the paramagnetic moment n p and decreases the Pauli part of susceptibility χ 0 . This suggests polarization of Co neighboring to Fe. Contribution of Co is seen in ferromagnetic moment n f . Fe dissolved into Ni 1.67 Ge increases χ 0 while n p remains nearly zero. This suggests that Fe loses the magnetic moment and contributes also to the Pauli paramagnetism. With increasing of Fe, it polarizes, making χ 0 fall off and n p grow rapidly. Thereafter n f appears and increases.