Orbital and spin magnetism in US - comparison with USe and UTe

Abstract

We report the results of two experiments performed on uranium monosulphide: measuring the magnetic Compton scattering (MCS) and x-ray magnetic circular dichroism (XMCD) at the M4,5 uranium absorption edges. From the MCS experiment we get the spin moment of both the localized (5f electrons) and the diffuse (mainly 6d electrons) contributions. Combining these results with bulk magnetization and published neutron diffraction data, we can separate the orbital and spin contributions to the localized and diffuse moments. Using the XMCD measurements, we deduce the expectation value of the magnetic dipole operator. We finally compare our results on US with published measurements made on USe and UTe.