Magnetic Properties of Rare Earth Copper Intermetallic Compounds, RCu₂. I. Heavy Rare Earth.

抄録

Measurements of magnetization and susceptibility have been made on single crystals of heavy rare earth copper compounds, RCu₂. All these compounds show metamagnetism with a relative low critical field at 4.2 K. The paramagnetic Curie temperatures along each principal axis are anisotropic. The crystal field parameters V₂⁰ and V₂² are determined from the values of anisotropic paramagnetic Curie temperatures on the basis of the molecular field theory. These values are in agreement with those evaluated from a point charge model. The neutron diffraction measurements on a TbCu₂ single crystal confirm the collinear magnetic structure.