MAGNETIC STRUCTURE AND EXCHANGE INTERACTIONS IN CUBIC GADOLINIUM COMPOUNDS

The two groups of metallic compounds Gd3+X3- (X=N, P, As, Sb, Bi) and Gd3+Z2- (Z=S, Se, Te) have the rocksalt structure and except for ferromagnetic GdN they are antiferromagnetic. Powder neutron diffraction measurements on GdS, GdSe, GdSb, and GdBi show them to have order of the second kind. The exchange interactions are discussed on the basis of the magnetic structure and susceptibility measurements. © 1969 The American Institute of Physics.