| La_(1．6-x)Nd_(0．4)Sr_xCuO_4超导电性的反常特性 |
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| 引用本文： | 黎文峰,贾忠伟.La_(1．6-x)Nd_(0．4)Sr_xCuO_4超导电性的反常特性[J].低温与超导,2006,34(5):369-372,385. |
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| 作者姓名： | 黎文峰 贾忠伟 |
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| 作者单位： | 1. 河南师范大学物理与信息工程学院,新乡,453007
2. 新乡广播电视大学,新乡,453000 |
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| 摘 要： | 分析并讨论了La_(1．6-x)Nd_(0．4)Sr_x CuO_4系列单相性样品(x=0．08～0．25)的晶体结构和超导电性。结果表明,晶体结构随着Sr掺杂量的变化规律与La_(2-x)Sr_x CuO_4系列相似。超导电性方面,La_(1．6-x)Nd_(0．4)Sr_x CuO_4系列超导转变温度均远小于相应的La_(2-x)Sr_xCuO_4系列组分。同La_(1．875)Ba_(0．125)CuO_4相似,La_(1．48)Nd_(0．4)Sr_(0．12)CuO_4处出现显著的极小值8K但高于La_(1．875)Ba_(0．125)CuO_4。La_(1．6-x)Nd_(0．4)Sr_x CuO_4系列的超导电性明显与La_(2-x)Sr_x CuO_4系列有着不同的特性,虽然同La_(2-x) Ba_xCuO_4系列相似但仍有区别。我们从其晶体结构的反常变化的角度对La_(1．6-x)Nd_(0．4)Sr_x CuO_4系列反常的超导电性做了初步的解释。
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| 关 键 词： | 单相性样品 晶体结构 超导电性 |
| 修稿时间： | 2006年5月19日 |
Abnormal properties in superconductivity of La1.6-xNd0.4SrxCuO4 system |
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| Li Wenfeng,Jia Zhongwei.Abnormal properties in superconductivity of La1.6-xNd0.4SrxCuO4 system[J].Cryogenics and Superconductivity,2006,34(5):369-372,385. |
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| Authors: | Li Wenfeng Jia Zhongwei |
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| Abstract: | The microstructure and superconductivity were systematically studied for La_(1.6-x) Nd_(0.4) Sr_x CuO_4 system (x=0.08～0. 25) with excellent phase structures.Change in the microstructure with the increase of Sr doped content resembles La_(2-x)Sr_xCuO_4 sys- tem.T_c is more lower than La_(2-x_Sr_xCuO_4 system with same Sr doped content,T_c of La_(1.48) Nd_(0.4) Sr_(0.12)CuO_4 is 8K which is higher than La_(1.88)Ba_(0.12)CuO_4.The superconductivity of La_(1.6-x)Nd_(0.4)Sr_xCuO_4 system obviously differs from La_(x-x)Sr_xCuO_4 system;although resembles La_(2-x)Sr_xCuO_4 system,the differences still exist.Abnormal mierostrueture explains the superconductivity of La_(1.6-x)Nd_(0.4) Sr_xCuO_4 system. |
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| Keywords: | Single phase sample Microstructure Superconductivity |
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