Pseudopotential Calculation of the Knight Shift and Relaxation Time in Magnesium

A nonlocal pseudopotential procedure has been utilized to obtain the conduction electron wave functions in magnesium metal. It is found that the use of these wave functions along with a finer scanning of the Fermi surface, namely, 110 points in $\frac{1}{24}$ of the Brillouin zone, leads to a value for the Knight shift $K_s$ in much better agreement with experiment than was an earlier value obtained by the orthogonalized-plane-wave procedure. Possible sources for the difference in theoretical $K_s$ values obtained by using these two different procedures are discussed. Improved values of the relaxation time $T_1$ and Korringa constant are also presented.