| YBaCuO超导体中Cl代O的研究 |
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| 引用本文： | 崔永杰,谢崇伟,杨晓云.YBaCuO超导体中Cl代O的研究[J].物理学报,1997,46(4):783-790. |
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| 作者姓名： | 崔永杰 谢崇伟 杨晓云 |
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| 作者单位： | (1)云南大学物理系; (2)云南省分析测试研究所 |
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| 基金项目： | 云南省应用基础研究资助的课题. |
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| 摘 要： | 用不同来源的Cl-部分取代Y123相中的O，结果表明：不论以什么方式掺杂，都能获得正交相．以CuCl2方式引入的Cl-主要占据在123相的O2位置上，而以BaCl2方式引入的Cl-则主要占据在O4位置，前者引起超导电性显著的变化，而且使正常态的电导行为由金属性变为半导体性；后者虽然导致Tc下降，但Tc＞77K，且正常态的电导行为未改变，说明CuO面上的氧
关键词：
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| 关 键 词： | YBCO 超导体 氯代氧 |
| 收稿时间： | 1996-02-27 |
SUBSTITUTION OF OXYGEN IN YBaCuO BY CHLOR INE |
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| CUI YONG-JIE,XIE CHONG-WEI and YANG XIAO-YUN.SUBSTITUTION OF OXYGEN IN YBaCuO BY CHLOR INE[J].Acta Physica Sinica,1997,46(4):783-790. |
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| Authors: | CUI YONG-JIE XIE CHONG-WEI and YANG XIAO-YUN |
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| Abstract: | Oxygen in YBaCuO superconductor was partly substituted by Cl- in the forms of CuCl2 and BaCl2．There sults show superconductive phase can be obtained no matter CuCl2 or BaCl2 was used. Cl- coming from CuCl2 ccupies O2 site of 123 phase, while Cl- coming from BaCl2 enters O4 site. The former effects superconductivity dramaticaly and the electrical conductivity of normal state changes from metallic behaviour to semiconductive behaviour. The latter reduces Tc，but Tc keeps larger than 77K and the electrical conductivity of normal state still remains metallic behaviour. All these suggest that the oxygen on the CuO plane (O2) plays an important role in the high Tc superconductivity. |
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