Observation of spin reorientation phase transition in GdGa2 single crystal by neutron diffraction

Abstract Neutron diffraction has been measured on the single crystal of GdGa2. At 4.6 K , the spin reorientation has been observed clearly. Also the anomalous temperature dependence of the magnetic neutron scattering intensities has been observed, which means the existence of complex magnetic structure such as a successive rotation of magnetic moment.