Magnetic Properties and Nuclear Magnetic Resonance of Cubic RCu5 Intermetallic Compounds

Abstract

The magnetic properties of the cubic RCu₅ compounds TbCu₅, DyCu₅, HoCu₅, ErCu₅, and TmCu₅ are reported for temperatures between 2.1° and 300°K. In the paramagnetic region the susceptibility follows a Curie‐Weiss law. The type of ordering at low temperatures changes with increasing atomic number from antiferromagnetic (R = Tb) to ferromagnetic (R = Ho, Er, Tm), while DyCu₅ is metamagnetic. The Knight shifts of the ⁶³Cu NMR in these compounds have been measured between 100° and 300°K. The results are discussed in terms of the Ruderman‐Kittel‐Kasuya‐Yosida theory.