Abstract
The effect of cobalt deficiency on the structural phase transition in the double layered cobaltite EuBaCo2–x O6–δ has been investigated using differential scanning calorimetry and high-temperature X-ray diffraction. It has been shown that, upon introduction of 5% cobalt vacancies, the energy and temperature of the phase transition from the orthorhombic unit cell (space group Pmmm) to the tetragonal unit cell (space group P4/mmm) decrease by 6% and 11°C, respectively, as compared to the corresponding values typical of stoichiometric EuBaCo2O6–δ. A model of the formation of cobalt–oxygen vacancies has been proposed.
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Original Russian Text © S.V. Telegin, S.V. Naumov, O.G. Reznitskikh, E.I. Patrakov, 2015, published in Fizika Tverdogo Tela, 2015, Vol. 57, No. 11, pp. 2222–2227.
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Telegin, S.V., Naumov, S.V., Reznitskikh, O.G. et al. Effect of cobalt deficiency on the structural phase transition in EuBaCo2–x O6–δ . Phys. Solid State 57, 2290–2296 (2015). https://doi.org/10.1134/S1063783415110347
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DOI: https://doi.org/10.1134/S1063783415110347