| 纳米ZrO2掺杂对烧结DyBaCuO块材微观结构及其超导电性的影响 |
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| 引用本文： | 刘石香,付华明,徐克西.纳米ZrO2掺杂对烧结DyBaCuO块材微观结构及其超导电性的影响[J].低温物理学报,2004,26(4):273-279. |
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| 作者姓名： | 刘石香 付华明 徐克西 |
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| 作者单位： | 上海大学物理系,上海,200436;上海大学物理系,上海,200436;上海大学物理系,上海,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： | 研究了纳米ZrO2掺杂及其掺杂浓度对烧结DyBa2Cu3Oy超导体的转变温度Tc和临界电流Ic在零磁场和磁场中的行为,在磁场中发现掺杂样品的临界电流密度明显高于纯DyBaCuO样品.这种磁场行为可能与掺杂样品粒子分布更加均匀,富纳米粒子区明显增加,从而形成有效钉扎中心有关.
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| 关 键 词： | 高温超导体 掺杂 钉扎中心 临界电流密度 |
| 修稿时间： | 2004年2月27日 |
EFFECT OF NANO-ZRO2 DOPING ON STRUCTURE AND SUPERCONDUCTING PROPERTIES OF SINTERED DyBaCuO |
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| LIU SHI-XIANG FU HUA-MING XU KE-XIPhysical.EFFECT OF NANO-ZRO2 DOPING ON STRUCTURE AND SUPERCONDUCTING PROPERTIES OF SINTERED DyBaCuO[J].Chinese Journal of Low Temperature Physics,2004,26(4):273-279. |
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| Authors: | LIU SHI-XIANG FU HUA-MING XU KE-XIPhysical |
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| Institution: | LIU SHI-XIANG FU HUA-MING XU KE-XIPhysical Department,Shanghai University,Shanghai 200436 |
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| Abstract: | The effect of nano-ZrO-2 doped in sintered DyBa-2Cu-3O-y was studied. Experiments on R-T curves and I-V characters of the studied samples show that doping with nano-ZrO-2 particles is favorable for enhancement of critical current for the sample under external magnetic field. Such a behavior seems to be resulted from regularly distributed dislocations and substantial increasing in rich nano-grain locations in the doped samples, which may act as effective pinning centers. |
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| Keywords: | high temperature superconductors doping pinning centers critical current density |
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