教師資料查詢 | 類別: 期刊論文 | 教師: 吳俊弘 Wu, Chunhung (瀏覽個人網頁)

標題:Superconductivity dependent on the amount of Bi and Sr in the Bi2Sr2CuO6 compounds
學年96
學期1
出版(發表)日期2007/09/01
作品名稱Superconductivity dependent on the amount of Bi and Sr in the Bi2Sr2CuO6 compounds
作品名稱(其他語言)
著者Wu, C. H.; Chu, Y. C.; Ling, D. C.; Liu, S. H.; Pong, W. F.; Hseu, H. S.; Chen, J. M.; Lee, J. F.; Kao, H.-C. I.
單位淡江大學化學學系; 淡江大學物理學系
出版者Amsterdam: Elsevier BV * North-Holland
著錄名稱、卷期、頁數Physica C: Superconductivity and its Applications 460-462 I, pp.422-423
摘要Two series of samples with nominal compositions of Bi2+xSr2CuOy and Bi2Sr2−xCuOy (0 ⩽ x ⩽ 0.10) were prepared by a conventional solid-state reaction method. Laminar morphology is observed for all the samples under SEM. EDS analysis shows that Bi is slightly volatile, the depletion amount is about 3% in the Bi rich samples, but only about 1% loses in the Sr deficient samples. Hole concentration of the Bi2Sr2−xCuOy series increases with increasing x, showing a hole doping effect caused by the depletion of the Sr ions. In contrary, Bi2+xSr2CuOy series has a hole filling effect by introducing the extra Bi ions. These samples show metallic conducting behavior in the normal state and superconducting property at lower temperature. Tc decreases with increasing x on both series. Bi2Sr2CuOy has the highest Tc at 7.9 K with an optimal hole concentration of 0.237. Hole concentrations obtained from the O-K edge XANES spectra and the iodometric titration agree well in these samples.
關鍵字Superconductivity;Bi2+xSr2CuOy;Bi2Sr2−xCuOy;Hole concentration;O-K edge XANES;Bi-L edge XANES
語言英文
ISSN0921-4534
期刊性質國外
收錄於SCI
產學合作
通訊作者
審稿制度
國別荷蘭
公開徵稿
出版型式紙本
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