Superconductivity of ternary rare earth compounds. IV. Coexistence of antiferromagnetism and superconductivity

Abstract

The possibility of the coexistence of antiferromagnetic order and superconductivity in ternary rare earth compounds is examined within the framework of our previous papers on the ferromagnetic case. It is demonstrated that antiferromagnetic ordering does not destroy the superconducting state, which coincides with recent experimental facts. The phase diagram and several thermodynamic properties are investigated. We calculate the upper critical fieldH c2 in the dirty limit, and compare it with the experimental data on Gd1.2Mo6S8. Some of the characteristic features ofH c2 can be explained qualitatively.