Study of magnetism and superconductivity in ternary rare-earth-based compounds

Abstract

Most of the studies on coexistence of magnetism (in local moment systems) and superconductivity (SC) had been made either on REMo 6S 8 chalcogenides or on RERh 4B 4 borides. In these systems, the SC arises due to Mo clusters and Rh clusters, respectively, while magnetism is due to rare-earth atom. Recently, we have established the coexistence of antiferromagnetism (AFM) and SC in a crystal structure RE 5T 4X 10 (RE = rare earth, Sc and Y, T = transition element Ir and Os, X = Ge and Si). In this work, we will describe our studies related to magnetism and SC in this structure. The important feature of this structure is that there are neither T-T contacts nor clusters of transition metal atoms. This is in contrast to that of Mo chalcogenides and Rh borides which have been well-studied.