| Ca掺杂对YBa2Cu3O7-δ超导块材性能影响的研究 |
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| 引用本文： | 付华明,刘石香,徐克西. Ca掺杂对YBa2Cu3O7-δ超导块材性能影响的研究[J]. 低温与超导, 2004, 32(2): 56-59 |
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| 作者姓名： | 付华明 刘石香 徐克西 |
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| 作者单位： | 上海大学物理系,200436;上海大学物理系,200436;上海大学物理系,200436 |
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| 基金项目： | 上海市纳米科技专项基金 |
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| 摘 要： | 用固相反应法制备了掺杂 Ca和不掺杂 Ca的 Y1 - x Cax Ba2 Cu3O7-δ超导块材。主要研究了 Ca掺杂对 Y1 - xCax Ba2 Cu3O7-δ(x≤ 0 .3)超导体性能的影响 ,采用标准四引线法测量了样品的 R - T和 I - V曲线。实验结果表明 :在YBCO超导体中掺杂适量的 Ca后临界温度 TC有所下降 ,样品的临界电流 IC有所增加 ,弱磁场下的 IC- H曲线下降幅度很平稳 ,这表明适量的 Ca掺杂有利于改善 YBCO超导体的临界电流性能
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| 关 键 词： | 高温超导体 Ca掺杂 临界电流密度Jc |
| 修稿时间： | 2004-02-13 |
Effect of Ca Doping on Superconducting Performance of YBCO Bulk |
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| Fu Huaming,Liu Shixiang,Xu Kexi. Effect of Ca Doping on Superconducting Performance of YBCO Bulk[J]. Cryogenics and Superconductivity, 2004, 32(2): 56-59 |
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| Authors: | Fu Huaming Liu Shixiang Xu Kexi |
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| Abstract: | Bulk-superconducting samples with Ca doping and with without Ca doping were prepared by solid-state reaction method. The effct of Ca-doping on performance of Y 1-x Ca xBa 2Cu 3O 7-δ (x≤0.3) bulk were studied through R-T, I-V characteristics and critical current as a function of external magnetic field. The results show that Ca doping resulted in a decrease of T C and a substantial increase in I C. The stabilization of I C in low magnetic field (up to 25G) was observed. The results show that doping by Ca is in favor of improvement in performance of J C. |
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| Keywords: | High T C superconductors Ca-doping Critical current J C |
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