Abstract
The influence of the oxygen content on the crystal chemical parameters of the LnBaCuFeO5 + δ (Ln = La, Pr) ferrocuprates is investigated using X-ray powder diffraction and IR spectroscopy. The electrical conductivity of these phases is studied. The chemical expansion coefficients αδ and the activation energies Ea for electrical conduction are calculated. It is demonstrated that, for the LnBaCuFeO5 + δ (Ln = La, Pr) phases, the chemical expansion coefficients ad depend on both the ionic radius of Ln3+ cations and the oxygen nonstoichiometry of the ferrocuprate, whereas the activation energies Ea for electrical conduction are predominantly determined by the oxygen content in the samples.
Published Version
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