Phase diagram of the electron-doped superconductor Pr1−xLaCexCuO4−δ

Abstract Systematic measurements of magnetic susceptibility and neutron diffraction were performed on both as-grown and oxygen-reduced single crystals of Pr 1− x LaCe x CuO 4− δ ( x =0.09, 0.11, 0.15 and 0.18) in order to study the electronic phase diagram as functions of both x and δ . Antiferromagnetic ordered phase appears in the x =0.09 and 0.11 samples for small value of δ at low temperature and degrades by either increasing Ce concentration or δ . Bulk superconductivity was observed in the wider x and δ region compared to that of Nd 2− x Ce x CuO 4 . A spin-glass-like phase appears in the limited region of δ in between 0.003 and 0.04, which weakly depends on x . Combining both results from susceptibility and neutron scattering measurement, we have obtained x – δ phase diagram of Pr 1− x LaCe x CuO 4− δ .