Structural and thermal properties of (YBa2Cu3)1− x Na x O7−δ materials

This letter discusses experimental data on thermal expansion and thermogravimetric analysis (TGA) to elucidate the structural and thermal characteristics of (YBa2Cu3)1−xNaxO7−δ materials. The experimental data reveal that the incorporation of sodium in the (YBa2Cu3)1−xNaxO7−δ materials stabilizes it...

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Bibliographic Details
Published in:Applied physics letters 1993-11, Vol.63 (22), p.3072-3074
Main Authors: Chen, Christina H., Kumar, Binod
Format: Article
Language:English
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Summary:This letter discusses experimental data on thermal expansion and thermogravimetric analysis (TGA) to elucidate the structural and thermal characteristics of (YBa2Cu3)1−xNaxO7−δ materials. The experimental data reveal that the incorporation of sodium in the (YBa2Cu3)1−xNaxO7−δ materials stabilizes its orthorhombic structure and makes it less sensitive to oxygen resorption and desorption processes. In addition, the sodium doping was found to raise the orthorhombic↔tetragonal phase transformation temperature. Furthermore, the Auger electron spectroscopy (AES) data reveal that sodium selectively replaces yttrium in the crystal lattice.
ISSN:0003-6951
1077-3118
DOI:10.1063/1.110236