| 铁掺杂Tl—1223超导相的额外氧缺陷研究 |
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| 引用本文： | 李阳,曹国辉.铁掺杂Tl—1223超导相的额外氧缺陷研究[J].物理学报,1996,45(9):1570-1577. |
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| 作者姓名： | 李阳 曹国辉 |
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| 作者单位： | (1)北京科技大学材料物理系; (2)北京科技大学材料物理系;中国科学院国际材料物理中心;中国科学院国家超导实验室; (3)北京科技大学材料物理系;中国科学院核分析技术开放实验室; (4)长沙矿冶研究院; (5)浙江大学物理系; (6)中国科学院核分析技术开放实验室 |
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| 基金项目： | 国家超导技术联合研究开发中心资助的课题. |
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| 摘 要： |
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| 关 键 词： | 高Tc 超导体 铁掺杂 氧化物超导体 氧缺陷 |
| 收稿时间： | 1995-04-18 |
EXTRA OXYGEN DEFECT INDUCED BY Fe-DOPING IN Tl-SYSTEM SUPERCONDUCTOR |
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| LI YANG,CAO GUO-HUI,WANG YUN-BO,MA QING-ZHU,XIONG XIAO-TAO,MA RU-ZHANG,CHEN NING,GUO YING-HUAN,XU ZHU-AN,ZHANG XIAO-JUN,WANG JIN-SONG,JIAO ZHENG-KUAN,PENG HUO-TIAN,ZHOU SI-HAI.EXTRA OXYGEN DEFECT INDUCED BY Fe-DOPING IN Tl-SYSTEM SUPERCONDUCTOR[J].Acta Physica Sinica,1996,45(9):1570-1577. |
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| Authors: | LI YANG CAO GUO-HUI WANG YUN-BO MA QING-ZHU XIONG XIAO-TAO MA RU-ZHANG CHEN NING GUO YING-HUAN XU ZHU-AN ZHANG XIAO-JUN WANG JIN-SONG JIAO ZHENG-KUAN PENG HUO-TIAN ZHOU SI-HAI |
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| Abstract: | In Fe-doped Tl-1223 superconducting phase, Fe-dopants significantly destroy superconductivity . Hall coefficient, thermogravimetric measurements and M?ssbauer effect show that Fe-dopants not only directly destroy the integrity of Cu-O layers to low superconduction transition temperature, but also induce extra oxygen to enter lattice. These extra oxygen defects can strengtheningly bind carriers in Cu-O layers, Such binding effect gives rise to decreasing of the carrier density with Fe-doping level increasing. In addition. the extra oxygen results in a deviation of its neibouring Fe(Cu) from center of Cu-O network, and from a new Fe-O coordination. It is important for high-Tc superconducting mechanism to study the structural details and carrier-binding effect of extra oxygen defect on superconducticity. |
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