New analysis of paramagnetic susceptibility

We investigate paramagnetism in metallic Pd. In order to explain experimental results on the magnetic field dependence of temperature-dependent susceptibility, we derive an extended version of the Pauli susceptibility, which includes the original Pauli susceptibility together with correction terms of both linear and cubic temperature-dependence. Our theory is in good qualitative agreement with experimental data of Pd, but starts to deviate from it above 800 K, though this could be addressed through the inclusion of the higher order terms of the perturbation. For Zr, the observed susceptibility is analyzed as three regions, i.e., linear-temperature dependent, linear and cubic-temperature dependent, and spin-glass-like.