NMR of Lu¹⁷⁵ in Ferromagnetic Lu–Tb and Lu–Dy Alloys

Abstract

The NMR of Lu¹⁷⁵ in ferromagnetic Lu(2%)–Tb and Lu(2%)–Dy alloys was investigated at 1.4 K. Assuming the asymmetry factors calculated by Holden et al. which are 0.32 and 0.35 for Tb and Dy respectively, the experimental results are analysed. The effective fields at the Lu nuclei are found to be 302 kG (Tb alloy) and 239 kG (Dy alloy). The principal values of the electric field gradients along the c-axis are 1.91×10²⁴cm⁻³ (Tb alloy) and 1.92×10²⁴cm⁻³ (Dy alloy). The conduction electron contribution to the electric field gradient is about 70% of that produced by the lattice charges.