The Superconducting Ferromagnet UCoGe.

The correlated metal UCoGe is a weak itinerant ferromagnet with a Curie temperature T=3 K and a superconductor with a transition temperature T=0.6 K. We review its basic thermal, magnetic-on the macro and microscopic scale-and transport properties, as well as the response to high pressure. The data unambiguously show that superconductivity and ferromagnetism coexist below T=0.6 K and are carried by the same 5 f electrons. We present evidence that UCoGe is a p-wave superconductor and argue that superconductivity is mediated by critical ferromagnetic spin fluctuations. [ABSTRACT FROM AUTHOR]