出版日期：1993-07-01 00:00:00

著者：Wu, D. S.; Yang, Y. F.; Kao, H. -C. I.; Wang, C. M.

單位：淡江大學化學學系

出版者：Amsterdam: Elsevier BV * North-Holland

著錄名稱、卷期、頁數：Physica C: Superconductivity 212(1-2), pp.32-36

摘要：A series of samples with nominal composition of La3CaχBa4−χCu7Oy (0≤χ≤4.00) was prepared by the conventional powder reaction method. Single-phase materials with triple-perovskite structure were obtained for χ≤1.25 samples of which the lattice parameters monotonically decreased with the increase of Ca substitution. Superconductivity was observed for χ≤3.50 samples with 37 K≤Tconset≤86 K. A Tc plateau above 80 K was found in the 1.00≤χ≤1.25 samples with a-axis length of 3.879≥a≥3.872 Å. In other words, an optimal rCu-O distance of ca. 1.94 Å in the Cu-O planes was the most appropriate value for superconductivity in the La3CaχBa4−χCu7Oy system.

語言：en

ISSN：0921-4534

期刊性質：國外

收錄於：SCI

國別：NLD

出版型式：紙本