Magnetic susceptibility of Ca1-xNaxPd3O4

The magnetic susceptibility chi (m) was measured for Ca1-xNaxPd3O4 between 2 K and 300 K. The intrinsic part of the observed X,, is expressed by both the Curie-Weiss and the Hasegawa-Moriya formula, and Ca1-xNaxPd3O4 (x > 0.3 ) is a metal in which the magnetic interaction between itinerant electrons will be antiferromagnetic. When analyzed by tile latter theory, tile Coulom b repulsion energy at an atomic site becomes 4.9 eV to 3.3 eV depending on the carrier density. Similarity and dissimilarity with high-T-c cuprates ar e discussed since the oxide is not superconducting at least above 2 K.