Single crystal study of the magnetic structure of a Pr-based antiferromagnet with competing interactions

Rare-earth based correlated materials often host competing interactions and electronic ground states associated with different degrees of freedom. We have examined a Pr-based antiferromagnet, which we find has an unusual magnetic phase diagram as a function of pressure and applied magnetic fields, exhibiting an intricate interplay of different magnetic and electronic states. We previously performed powder neutron diffraction measurements using the WISH diffractometer, which revealed antiferromagnetic Bragg peaks below the magnetic transition, as well as diffuse magnetic scattering. In order to unambiguously determine the complex magnetic structure, and to probe the nature of the diffuse scattering, here we propose a follow-up experiment to measure the low temperature single crystal neutron diffraction using WISH. Knowledge of the nature of both the long range and short range magnetic ordering will allow us to gain a microscopic understanding of the magnetism, and is important for modelling the magnetic phase diagram and revealing the mechanisms behind the unusual interplay of different phases.