Magnetic Properties of (Fe, Co)_1.67Ge and (Fe, Ni)_1.67Ge

Abstract

Effects of substitution of Fe and Ni or Co in the Pauli-paramagnetic compounds Co_1.67Ge and Ni_1.67Ge were investigated on (Fe, Co)_1.67Ge and (Fe, Ni)_1.67Ge. Substitution of Fe for Co in Co_1.67Ge increases the paramagnetic moment n_p and decreases the Pauli part of susceptibility χ₀.
This suggests polarization of Co neighboring to Fe. Contribution of Co is seen in ferromagnetic moment n_f. Fe dissolved into Ni_1.67Ge increases χ₀ 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 χ₀ fall off and n_p grow rapidly. Thereafter n_f appears and increases.