节点文献
T*相超导体（Bi,Sr）2（Y,Ce）2Cu2Oy的性质研究
STUDY ON PROPERTIES OF T PHASE SUPERCONDUCTING CUPRATES (Bi 0 5 Sr 1 5 )(Y,Ce) 2Cu 2O y
【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０１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
【Abstract】 The optimal synthesis of T phase superconductors(Bi 0 5 Sr 1 5 )(Y,Ce) 2Cu 2O y was studied in detail. Slow cooling was required for preparation of single phase T type compounds. After quenching,the samples contained Ce 2Y 2O 7as 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.
【基金】 国家超导技术联合研究开发中心资助
- 【文献出处】 物理学报 ,ACTA PHYSICA SINICA , 编辑部邮箱 ,1997年05期
- 【分类号】O511
- 【下载频次】21