Calculations of the electronic spin and orbital magnetic moments andg′in ferromagnetic nickel

The magnitudes of the electronic spin and orbital magnetic moments and the magnetomechanical ratio ($g^{\prime }$) for forromagnetic nickel were calculated using the model-Hamiltonian approach of Ehrenreich and Hodges. Comparison of the calculated $g^{\prime }$ with the experimental value demonstrates the validity of the method. The good quantitative results for both the orbital moment and $g^{\prime }$ show that it is possible to take account of spin-orbit coupling and incomplete quenching of orbital angular momentum in a simple way. It is suggested that the neglect of the orbital contribution can lead to errors of as much as 10% in related band calculations and theoretical work.