Magnetic Susceptibilities and Spin Structures in Gadolinium Pnictides. II. Carrier Concentration Effect in the Semimetallic Case

抄録

The magnetic susceptibilities of Gd monopnictides are calculated numerically for the semimetallic and metallic cases using the various tight binding band structures fitted to the APW result of LaP, and the carrier concentration effects on the spin orderings, θ_p and T_N are investigated in detail, in which θ_p and T_N are the paramagnetic Curie and Néel temperatures, respectively. The contributions to the susceptibilities caused by various scattering processes are analyzed in detail, and the main processes are clarified for the semimetallic and metallic cases. Comparisons with the experiments for Gd monopnictides and GdP–GdS systems are also performed. Our calculations give the best agreement with the experiments in the theoretical works so far carried out, although there are many discrepancies.