Abstract
We present a detailed study of the magnetic and electronic properties of U2Rh3Si5, a material that has been demonstrated to exhibit a first-order antiferromagnetic phase transition. From a high-magnetic-field study, together with extensive experiments in moderate fields, we establish the magnetic phase diagrams for all crystallographic directions.
The possibility of an electronic phase in a narrow interval above the Neel temperature as a precursor of a magnetic phase is discussed.