Nuclear Magnetic Resonance and Relaxation in Liquid Tellurium

Abstract

Data are presented for the ${\mathrm{Te}}^{125}$ Knight shift (${\mathcal{K}}^{125}$) and spin-lattice relaxation rate ($\frac{1}{T_1}$) over the temperature ranges 675-1250 K and 680-900 K, respectively, in liquid tellurium. The temperature dependence of ${\mathcal{K}}^{125}$ is compared with that of the total magnetic susceptibility and is shown to result mainly from a temperature-dependent density of states at the Fermi level. The Knight shifts and magnetic relaxation rates are also correlated with the temperature-dependent electrical conductivity and Hall coefficient. These results indicate that electronic transport in Te below about 900 K can be described by a strong-scattering or diffusive model. However, the observed dependence of the Hall coefficient on the inverse square of ${\mathcal{K}}^{125}$ is in disagreement with theoretical predictions for this situation.