| 掺Pb超导体（Bi2—xPbx）Ca2.5Nd0.5Cu2O8＋y的正电子寿命研究 |
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| 引用本文： | 史志强,钞曦旭.掺Pb超导体（Bi2—xPbx）Ca2.5Nd0.5Cu2O8＋y的正电子寿命研究[J].核技术,1995,18(2):73-75. |
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| 作者姓名： | 史志强 钞曦旭 |
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| 作者单位： | 陕西师范大学 |
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| 摘 要： | 室温测量了（Ｂｉ２－ｘＰｂｘ）Ｃａ２．５Ｎｄ０．５Ｃｕ２Ｏ８＋ｙ超导体的正电子寿命与Ｐｂ含量的关系。在２２１２相发现随着Ｐｄ含量的增加正电子体寿命相应地减小，分析表明，这是由于Ｐｂ替换了Ｂｉ，使电子从Ｃｕ－Ｏ面或其它晶位迁移到Ｂｉ－Ｏ层，并导致Ｂｉ－Ｏ层电子密度增加所致。
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| 关 键 词： | 超导体 正电子寿命 BPCNCO 铅 掺杂 |
The positron lifetime study of Pb doped(Bi_(2-x)Pb_x) Ca_(2.5)Nd_(0.5)Cu_2O_(8+y)superconductors |
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| Shi Zhiqiang,Chao Xixu.The positron lifetime study of Pb doped(Bi_(2-x)Pb_x) Ca_(2.5)Nd_(0.5)Cu_2O_(8+y)superconductors[J].Nuclear Techniques,1995,18(2):73-75. |
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| Authors: | Shi Zhiqiang Chao Xixu |
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| Abstract: | The positron lifetime has been measured as a function of doped Pb content in(Bi2-xPbx)Ca2.5Nd0.5Cu2O8+y.superconductors.It was found that positron lifetime decreased with the increase of Pb content in 2212 phase.It is believed that Pb substitutes for Bi,which makes some electrons transfer from Cu-O planes or other sites to Bi-O layers,increases the electron density at Bi-O layers and causes Tc to rise. |
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| Keywords: | Superconductors Positron lifetime |
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