Abstract
Microscopic information on the magnetic state in U(In 1− x Sn x ) 3 is obtained by perturbed angular correlation (PAC) spectroscopy. For temperatures above the magnetic ordering, the electric quadrupole hyperfine interaction strength follows a linear temperature dependence, while the magnitude reveals a reduced electronic enhancement. In the pseudo-binary compounds we conclude that the valence difference between In and Sn is small. The low temperature PAC spectra for the indium-rich compounds are understood in terms of a two-sites model with temperature dependent relative populations but confirm the triple- k anti-ferromagnetic ordering suggested earlier to reconcile Mössbauer and neutron scattering data. For the pure UIn 3 case, however, a spin reorientation is observed.
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