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With an aim to understand the origin of the low thermal expansion coefficients (TECs), cation-substituted YBaCo4O7-type oxides have been investigated by in-situ neutron diffraction, bond valence sum (BVS), thermogravimetric analysis, and dilatometry. The compositions YBaCo3ZnO7+δ, Y0.9In0.1BaCo3ZnO7+δ, and Y0.9In0.1BaCo3Zn0.6Fe0.4O7+δ were synthesized by solid-state reaction at 1200 °C. Rietveld refinement...
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