Abstrakt
UGa2 is 5f ferromagnet with T (C) = 126 K. High-pressure study of a single crystal exhibits a dramatic increase of T (C) without any sign of saturation, reaching 155 K at p = 7 GPa, corresponding to +4 K/GPa.
Such effect can be understood assuming a weak 5f delocalization and an exchange interaction driven by the hybridization with non-f states, which is strengthened under pressure.