教師資料查詢 | 類別: 期刊論文 | 教師: 林大欽 LING, DAH-CHIN (瀏覽個人網頁)

標題:The Occurrence of Bulk Superconductivity in the TlBa2CuO5−δ-Type (1021) System
學年
學期
出版(發表)日期1989/01/01
作品名稱The Occurrence of Bulk Superconductivity in the TlBa2CuO5−δ-Type (1021) System
作品名稱(其他語言)
著者Ku, H. C.; Shi, J. B.; Ling, D. C.; Hsu, S. W.; Hwang, G. H.; Lin, T. Y.
單位淡江大學物理學系
出版者Japan Society of Applied Physics
著錄名稱、卷期、頁數Japanese Journal of Applied Physics 28pt2(6), pp.L923-L925
摘要Stable and reproducible superconductivity in the Tl(Ba2−xLax)CuO5−δ (0.0≤x≤0.6) system with the tetragonal TlBa2CuO5−δ-type (1021) structure was reported. A Prototype compound TlBa2CuO5−δ had shown a metastable superconducting onset around 25 K, with zero resistivity at 10 K. With partial substitution of La for Ba ions, Tc (50% resistivity drop) increases to 45 K, Tc0 (zero resistivity) to 42 K and onset around 50 K. A diamagnetic signal was observed with onset as high as 57 K. Tetragonal lattice parameters decrease with the increasing La concentration due to the partial replacement of larger Ba2+ ions by smaller La3+ ions. The Pairing field energy of 170 K and electron-elementary excitation coupling constant λ of 0.76 were derived from the BCS-like Tc formula through comparison with other single Tl–O layer systems TlCan−1Ba2CunO2n+3−δ.
關鍵字
語言英文
ISSN1347-4065
期刊性質國外
收錄於SCI;
產學合作
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審稿制度
國別日本
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