Abstract

Abstract Systematic measurements of magnetic susceptibility and neutron diffraction were performed on both as-grown and oxygen-reduced single crystals of Pr1−xLaCexCuO4−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 Nd2−xCexCuO4. 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 Pr1−xLaCexCuO4−δ.

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