Current-determined orbital magnetization in a metallic magnet

In the framework of density functional theory a calculation of the orbital magnetization for a metallic magnet is carried out, obtaining it from the orbital current density. A gauge freedom inherent in this calculation is discussed. Choosing the compound U₃Sb₄ we calculate the orbital current density from which we obtain the corresponding magnetization in the Trammel gauge. We compare the properties of the magnetization with the properties of the f-electron and the orbital angular momentum densities.