U(As1-xSex) solid solutions. I. Resonant x-ray and neutron scattering study of the magnetic phase diagram - art. no. 134401

We report on a study of the magnetic structure and phase transitions of the UAs1-xSex solid solutions employing x-ray and neutron scattering. We have focused this study on compositions 0.18<x<0.22, in which magnetic structure s having double-k and triple-k configurations are found with increasing x. In general, our findings are in excellent agreement with those reported by Kuznietz'et al. using solely neutron diffraction. However, our x-ray studie s have added several important details about (1) the incommensurate transit ions near T-N, (2) the nature of the 2k-3k phase boundary, and (3) the disc overy of a new magnetic phase.