Pressure-induced superconductivity in ferromagnetic UIr without inversion symmetry

We report the discovery of pressure-induced superconductivity in ferromagnetic UIr, which lacks inversion symmetry in the crystal structure. The Curie temperature TC1 = 46?K at ambient pressure decreases with increasing pressure, reaching a value of 11?K at 1.5?GPa. It presumably decreases further up to about Pc1 = 1.7?GPa. The ferromagnetic region named 'F1' exists up to Pc1. A second magnetic phase named 'F2' with a low ferromagnetic moment appears in the pressure range from?1.9 to 2.4?GPa. In the 'F2' phase, the magnetic transition temperature TC2 decreases with pressure, from 18?K at 1.9?GPa to approximately zero at PC2 = 2.6?2.7?GPa. In this critical pressure region, superconductivity appears below Tsc = 0.14?K.