Electronic structure and x-ray magnetic circular dichroism in uranium compounds. III. Heavy-fermion compounds

The electronic structure and x-ray magnetic circular dichroism (XMCD) spectra of heavy-fermion compounds UPt3, URu2Si2, UPd2Al3, UNi2Al3, and UBe13 are investigated theoretically from first principles, using the fully relativistic Dirac linear muffin-tin orbital band-structure method. The electronic structure is obtained with the local spin-density approximation (LSDA), as well as with a generalization of the LSDA+U method. The origin of the XMCD spectra in the compound is examined.