ORBITAL AND SPIN ORBIT MAGNETIC-SUSCEPTIBILITIES IN FACE-CENTERED CUBIC TRANSITION-METALS AND NOBLE-METALS

The uniform unenhanced orbital and spin-orbit susceptibilities, chi-o and chi-so, respectively, in Ni, Pd and Pt are evaluated by taking numerical extrapolations to q = 0 of our previous expression for the wavenumber (q)-dependent orbital and spin-orbit susceptibilities, chi-o(q) and chi-so(q), respectively. The wavefunctions and energies required in these calculations are obtained from self-consistent relativistic APW band calculations in the relativistic local-density approximation. From a study of trends in chi-o and chi-so with the number of conduction electrons per atom ratio for FCC 3d, 4d and 5d metal series, chi-o and chi-so in Rh, Ir, Cu, Ag and Au are estimated in the rigid-band assumption with reasonable corrections. For all these metals, our values of chi-o + chi-so show good agreement with empirical values. By using previously reported theoretical values of the enhanced spin susceptibility I-chi-s, the total susceptibility chi = I-chi-s + (chi-o + chi-so) is estimated and compared with observed results for these metals.