Synthesis of Cuprate Based High-Tc Superconductors by Polymerized Complex Method
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<jats:title>ABSTRACT</jats:title><jats:p>We report on a novel precursor technique to produce highly pure and homogeneous cuprate based high-Tc superconductors based on the formation of a polymer metal complex in which various metal ions in desired stoichiometric ratio can be uniformly dispersed. Application of the polymerized complex method is demonstrated on the ceramic synthesis of polycrystalline compounds viz. YBa<jats:sub>2</jats:sub>Cu<jats:sub>3</jats:sub>O<jats:sub>y</jats:sub>, YBa<jats:sub>2</jats:sub>Cu<jats:sub>4</jats:sub>O<jats:sub>y</jats:sub>, Bi<jats:sub>1.6</jats:sub>Pb<jats:sub>0.4</jats:sub>Sr<jats:sub>2</jats:sub>Ca<jats:sub>2</jats:sub>Cu<jats:sub>3</jats:sub>O<jats:sub>y</jats:sub> and Bi<jats:sub>2</jats:sub>Sr<jats:sub>2</jats:sub>Ca<jats:sub>0.8</jats:sub>Cu<jats:sub>2</jats:sub>O<jats:sub>y</jats:sub>. The superconducting properties were studied with complex magnetic susceptibility measurements which exhibited sharp superconducting transitions without any indication of two-phase character. The materials fabricated by this method showed improved properties compared to those for ceramic samples of previously reported synthesis procedures.</jats:p>
収録刊行物
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- MRS Proceedings
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MRS Proceedings 271 1992-01-01
Springer Science and Business Media LLC