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无机材料学报

无机材料学报 ›› 2010, Vol. 25 ›› Issue (12): 1273-1276.DOI: 10.3724/SP.J.1077.2010.01273 CSTR: 32189.14.SP.J.1077.2010.01273

• 研究论文 • 上一篇    下一篇

高性能Y0.5Gd0.5BCO薄膜的研究

吴紫平, 索红莉, 刘 敏, 叶 帅, 汤 潇   

  1. (北京工业大学 材料科学与工程学院, 国家教育部功能材料重点实验室, 北京100124)
  • 收稿日期:2010-03-09 修回日期:2010-04-27 出版日期:2010-12-20 网络出版日期:2010-11-24
  • 基金资助:

    国家973计划(2006CB601005); 国家自然科学基金(50802004); 北京市自然科学基金(2092006)

Study on Superior Property of Y0.5Gd0.5BCO Films

WU Zi-Ping, SUO Hong-Li, LIU Min, YE Shuai, TANG Xiao   

  1. (The Key Laboratory of Advanced Functional Materials, Ministry of Education, Beijing University of Technology, Beijing 100124, China)
  • Received:2010-03-09 Revised:2010-04-27 Published:2010-12-20 Online:2010-11-24
  • Supported by:

    973 Program (2006CB601005); National Nature Science Foundation of China (50802004); Nature Science Foundation of Beijing (2092006)

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摘要： 通过在YBCO前驱溶液中加入醋酸钆(Gd(CH3COO)3), 使元素Gd部分取代Y, 成功地制备了Y0.5Gd0.5BCO薄膜, 该薄膜成分单一且具有很好的c轴取向. 通过对Y0.5Gd0.5BCO薄膜和YBCO、GdBCO薄膜的超导性能比较发现, 虽然Y0.5Gd0.5BCO薄膜的临界转变温度(Tc)(约为90.5 K)较YBCO和GdBCO薄膜有所下降, 但是在65K、自场下, Y0.5Gd0.5BCO薄膜具有最高的临界电流密度(Jc)值, 为4.87MA/cm2. 且随着外加磁场的增加, Jc值提高的较多. 在3T的磁场下, Y0.5Gd0.5BCO薄膜的Jc值分别是纯GdBCO和YBCO薄膜的1.8倍和5.1倍. 此外, 替代还有效提高了薄膜的磁通钉扎力. 

关键词: YBCO薄膜, 元素替代, 低氟MOD, 场性能

Abstract: The Y0.5Gd0.5BCO film was successfully fabricated by fluorine-reduced MOD method through dissolving Gd(CH3COO)3 into the precursor solution. As a result, Y was partially substituted by Gd and all the films have well c-axis orientation. By comparing the superconducting properties, it is found that the Y0.5Gd0.5BCO film has lower critical transition temperature Tc (90.5K) than that of the pure YBCO and GdBCO films. Yet the Y0.5Gd0.5BCO film has the highest critical current density Jc value about 4.87MA/cm2 at 65K and self-field. In addition, the Jc value of Y0.5Gd0.5BCO film is enhanced significantly as increasing the applied magnetic field. The Jc value of Y0.5Gd0.5BCO film is 1.8 times and 5.1 times of that of the pure GdBCO and YBCO films at 65K and 3T applied field, respectively. Furthermore, the pinning force of the Y0.5Gd0.5BCO film is effectively improved by the elemental substitutions.

Key words: YBCO film, elemental substitutions, fluorine-reduced MOD, field-property

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