Abstract

DIOSA, Jesús E.; PENA LARA, Diego  and  VARGAS, Rubén A.. Phase Behavior of La2CuO4+ δdue to the Oxygen Content. rev. cienc. [online]. 2015, vol.19, n.1, pp.65-69. ISSN 0121-1935.

In-situ resistivity ρ(T) measurements have been used in air ambient to study the phase behaviorabove room temperature of the La2CuO4+δ system, in samples thermically treated in order to obtain oxygenated and deoxygenated samples. Our results in oxygenated samples have shown an anomaly ataround 600 K corresponding to the orthorhombic to tetragonal structural phase transition. However, this anomaly was observed with higher intensity in the first heating sweep in deoxygenated samples, which we have attributed to the fast oxygen in-diffusion into the sample at around this temperature

Keywords : La2CuO4+δ; resistivity.

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