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Large spin-orbit interaction produces large orbital magnetic moments in narrow energy bands. Since the orbital character of the wave functions is more important in orbital than in spin magnetism, the limitations of the local spin density approximation become evident. It is possible to keep the orbital dependence of the exchange interactions by using an orbital polarization scheme or by using Hartree-Fock theory with screened Slater integrals for exchange. This leads to an enhancement of the calculated orbital moment when the magnetism is strong. Recently calculated magnetic moments and calculated sum rules for X-ray magnetic circular dichroism in US are described.

Additional information

Authors: BROOKS M S S, European Commission, Joint Research Centre, Intitute for Transuranium Elements, Karlsruhe (DE)
Bibliographic Reference: An article published in: Applied Physics A, Volume 73 Issue 6 (2001) pp 659-661
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