ABSTRACT

The magnetic susceptibility of YbPdX satisfies the Curie-Weiss law in the temperature range 4.2 to 300 K. The temperature dependence of the magnetic susceptibility and the electrical resistivity suggests that CeNiIn is an intermediate-valence compound. The temperature dependence of the magnetic susceptibility of CeRhln also indicates the mixed-valence behavior. The family of intermetallic phases with the stoichiometric composition 1:2:2 was found to be particularly numerous. In addition, their physical properties turned out to be very interesting. A vast amount of experimental data indicates that the T component usually does not carry a magnetic moment in most of these phases, with the exception of manganese-containing compounds. A vast amount of experimental data indicates that the T component usually does not carry a magnetic moment in most of these phases, with the exception of manganese-containing compounds. NdRh2Si2 and NdRh2Ge2 compounds are exhibit a colinear antiferromagnetic AFI-type structure.