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YBa2Cu1-xCox(Cu1-yZny)2Oz体系的Co,Zn共同掺杂效应

许祝安 方明虎 赵勇 张其瑞 张仕勇 王明华 程香爱 沙健 胡素辉

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YBa2Cu1-xCox(Cu1-yZny)2Oz体系的Co,Zn共同掺杂效应

许祝安, 方明虎, 赵勇, 张其瑞, 张仕勇, 王明华, 程香爱, 沙健, 胡素辉

DOPING EFFECTS IN YBa2Cu1-xCox(Cu1-yZny)2Oz SYSTEM

Xu Zhu-an, Fang Ming-hu, Zhao Yong, Zhang Qi-rui, Zhang Shi-yong, Wang Ming-hua, Cheng Xiang-ai, Sha Jian, Hu Su-hui
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  • 本文报道通过对YBa2Cu1-xCox(Cu1-yZny)2Oz(0≤x,y≤0.1)体系晶体结构、氧含量、正常态电阻-温度关系、Hall效应以及超导临界温度等的综合测量,发现随着Co和Zn含量的增加,体系经历了从正交结构的超导金属向四方结构的非超导半导体的转变,超导临界温度Tc和载流子浓度nh均迅速下降,Co
    The crystal structure, oxygen content, resistance, Hall effect and superconducting crkical temperature of YBa2Cu1-xCox(Cu1-yZny)2Oz system (0≤x, y≤0.1) have been studied. It is found that with increase of Co and Zn contents, the transformation from superconducting metal with orthorhombic structure to non-superconducting semiconductor with tetragonal structure occurs. At the same time, the Tc and the carrier density nh decrease sharply. The effects with Co and Zn doping simultaneously are not simply additive. With increase of Co and Zn concentrations, there is a strong coorelation between Co doping on Cu(l) and Zn on Cu (2) sites. The experimental results show that the coupling between Cu-O planes and Cu-O chains gives much influence on the electronic transport properties in normal states and superconductivity. The characteristics of the hole carriers and its dependence on Tc in 123 phase compounds are also dicussed.
    • 基金项目: 国家自然科学基金
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  • 文章访问数:  3578
  • PDF下载量:  534
  • 被引次数: 0
出版历程
  • 收稿日期:  1990-07-30
  • 刊出日期:  2005-07-01

YBa2Cu1-xCox(Cu1-yZny)2Oz体系的Co,Zn共同掺杂效应

  • 1. (1)浙江大学化学系,杭州,310027; (2)浙江大学物理系,杭州,310027; (3)中国科学技术大学物理系,合肥,230026; (4)中国科学院上海冶金研究所,上海,200050
    基金项目: 

    国家自然科学基金

摘要: 本文报道通过对YBa2Cu1-xCox(Cu1-yZny)2Oz(0≤x,y≤0.1)体系晶体结构、氧含量、正常态电阻-温度关系、Hall效应以及超导临界温度等的综合测量,发现随着Co和Zn含量的增加,体系经历了从正交结构的超导金属向四方结构的非超导半导体的转变,超导临界温度Tc和载流子浓度nh均迅速下降,Co

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