Magnetic phase diagram of UNi2Si2 under magnetic field and high-pressure

Abstract Measurements of electrical resistance under high pressure and neutron diffraction in high-magnetic field of single crystalline UNi 2 Si 2 have been performed. We have found the analogy between the p – T and B – T magnetic phase diagrams. It is also found that the propagation vector q Z of incommensurate antiferromagnetic phase decreases with increasing magnetic field. A new pronounced pressure-induced incommensurate–commensurate magnetic phase transition has been detected.