| T*相超导体(Bi,Sr)2(Y,Ce)2Cu2Oy的性质研究 |
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| 引用本文： | 张永健,陈仙辉,曹烈兆. T*相超导体(Bi,Sr)2(Y,Ce)2Cu2Oy的性质研究[J]. 物理学报, 1997, 46(5): 975-980 |
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| 作者姓名： | 张永健 陈仙辉 曹烈兆 |
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| 作者单位： | 中国科学技术大学物理系 |
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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： | 研究了T*相超导体（Bi，Sr）2（Y，Ce）2Cu2Oy的成相规律，发现缓冷对T*相单相样品的制备是有利的．淬火样品的主相物质为Ce2Y2O7，完全不含T*相结构．在室温到熔化温度的范围，热分析未观察到结构相变．在240—460℃，相对每个Cu原子超导体失氧约0.1个氧．氧气中烧结并缓冷到室温的样品在30K出现零电阻现象关键词：
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| 关 键 词： | 超导体物理 T^＊相 成相规律 |
| 收稿时间： | 1995-10-16 |
STUDY ON PROPERTIES OF T* PHASE SUPERCONDUCTING CUPRATES (Bi0.5Sr1.5)(Y,Ce)2Cu2Oy |
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| ZHANG YONG-JIAN,CHEN XIAN-HUI and CAO LIE-ZHAO. STUDY ON PROPERTIES OF T* PHASE SUPERCONDUCTING CUPRATES (Bi0.5Sr1.5)(Y,Ce)2Cu2Oy[J]. Acta Physica Sinica, 1997, 46(5): 975-980 |
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| Authors: | ZHANG YONG-JIAN CHEN XIAN-HUI CAO LIE-ZHAO |
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| Abstract: | The optimal synthesis of T* phase superconductors(Bi0.5Sr1.5)(Y,Ce)2Cu2Oy was studied in detail. Slow cooling was required for preparation of single phase T*-type compounds. After quenching,the samples contained Ce2Y2O7 as the major phase without T* structure presented. From room temperature to 1000℃ phase transition was not observed by thermal analysis. Upon slow cooling in oxygen, T*-type cuprates exhibited zero resistance at 30K. |
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