Formation Behavior of High-T_c Tl-based Superconductors
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概要
- 論文の詳細を見る
The effects of Ca, Cu, and Ca-Cu richness on the formation behavior and physical characteristics of high-T_c Tl-based superconductors were investigated systematically. In addition to sintering temperature and time, intermediate phases which proved important to the formation and properties of nearly single-phase, triple-CuO-layers Tl_2Ba_2Ca_2Cu_3O_y superconductors and optimal processing conditions were also investigated. Ca and Ca-Cu richness introduced positive effects on the properties of nearly single-phase Tl_2Ba_2Ca_2Cu_3O_y superconductors and helps in the formation of the appropriate intermediate phases, whereas Cu richness produced a negative effect. The higher sintering temperatures of the specimens accounted for the tailing of electrical resistance before the critical zero resistance temperature was approached, and for the instability of the superconducting phase. Lower post-annealing temperatures of the bulk samples slightly improved the superconducting properties. The resultant bulk Tl-based superconductors can be used as a Tl vapor source for the formation of superconducting thin films within a closed system.
- 社団法人応用物理学会の論文
- 1999-02-15
著者
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Lin C.s.
Department Of Materials Science And Engineering National Tsing-hua University
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Tseng T
Department Of Electronics Engineering And Institute Of Electronics National Chiao-tung University
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KOO H.S.
Department of Electronics Engineering and Institute of Electronics, National Chiao-Tung University
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LO J.R.
Department of Electronics Engineering and Institute of Electronics, National Chiao-Tung University
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TSENG T.Y.
Department of Electronics Engineering and Institute of Electronics, National Chiao-Tung University
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Lo J.r.
Department Of Electronics Engineering And Institute Of Electronics National Chiao-tung University
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Koo H.s.
Department Of Electronics Engineering And Institute Of Electronics National Chiao-tung University