Structural phase transition in superconducting BaPb0.75Bi0.25O3 |
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Authors: | M Oda Y Hidaka A Katsui T Murakami |
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Institution: | Ibaraki Electrical Communication Laboratory, NTT Tokai Ibaraki, 319-11, Japan |
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Abstract: | The room temperature crystallographic properties of distorted perovskite-type system BaPb1-xBixO3 were examined by using X-ray diffraction analysis. In addition, structural temperature changes were investigated for superconducting BaPb0.75Bi0.25O3 crystals with Tc=11.4K. It was found that the room temperature structure of BaPb1-xBixO3 has an orthorhombic symmetry in the range of O≤×?0.9 and a monoclinic one in 0.9?×≤1, and that superconducting BaPb0.75Bi0.25O3 shows a structural transition from an orthorhombic to a monoclinic phase at about 160K. |
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