| 標題：Superconductivity dependent on the amount of Bi and Sr in the Bi2Sr2CuO6 compounds |
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| 學年 | 96 |
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| 學期 | 1 |
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| 出版（發表）日期 | 2007/09/01 |
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| 作品名稱 | Superconductivity dependent on the amount of Bi and Sr in the Bi2Sr2CuO6 compounds |
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| 作品名稱（其他語言） | |
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| 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. |
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| 單位 | 淡江大學化學學系; 淡江大學物理學系 |
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| 出版者 | Amsterdam: Elsevier BV * North-Holland |
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| 著錄名稱、卷期、頁數 | Physica C: Superconductivity and its Applications 460-462 I, pp.422-423 |
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| 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. |
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| 關鍵字 | Superconductivity;Bi2+xSr2CuOy;Bi2Sr2−xCuOy;Hole concentration;O-K edge XANES;Bi-L edge XANES |
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| 語言 | 英文 |
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| ISSN | 0921-4534 |
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| 期刊性質 | 國外 |
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| 收錄於 | SCI |
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| 產學合作 | |
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| 通訊作者 | |
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| 審稿制度 | |
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| 國別 | 荷蘭 |
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| 公開徵稿 | |
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| 出版型式 | 紙本 |
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| 相關連結 | |
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