Magnetic phase diagram of the S = 1/2 triangular layered compound NaNiO(2): a single crystal study.

Using magnetic torque measurements on a NaNiO2 single crystal, we have established the magnetic phase diagram of this triangular compound. It presents five different phases depending on the temperature (4-300 K) and magnetic field (0-22 T) revealing several spin reorientations coupled to different magnetic anisotropies.