| 0212型Ca3Cu2O4+δCl2-y化合物高温高压合成与研究 |
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| 引用本文： | 杨达晓,刘清青,高伟波,于文,李凤英,靳常青.0212型Ca3Cu2O4+δCl2-y化合物高温高压合成与研究[J].高压物理学报,2007,21(1):15-19. |
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| 作者姓名： | 杨达晓 刘清青 高伟波 于文 李凤英 靳常青 |
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| 作者单位： | 1. 中国科学院物理研究所,北京,100080;北京科技大学物理系,北京,100083
2. 中国科学院物理研究所,北京,100080 |
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| 摘 要： | 利用“顶角氧掺杂”机制，即以二价氧部分替代顶角一价氯，用Ag2O做氧源，在高温高压下制备了单相的Ca3Cu2O4+δCl2-y样品。X射线衍射分析发现，随着Ag2O含量的增加，Ca3Cu2O4+δCl2-y样品的晶格常数a逐渐变小，c逐渐增大，体现了空穴掺杂的本质。进行了电阻率和磁化率测量，没有发现超导性，可能是空穴载流子没有达到合适的浓度所致。
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| 关 键 词： | 高温高压合成 顶角氧掺杂 Ca3Cu2O4Cl2 |
| 文章编号： | 1000-5773（2007）01-0015-05 |
| 收稿时间： | 2006-09-27 |
| 修稿时间： | 2006-12-30 |
High Temperature and High Pressure Synthesis and Study of 0212-Type Ca3Cu2O4+δCl2-y |
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| YANG Da-Xiao,LIU Qing-Qing,GAO Wei-Bo,YU Wen,LI Feng-Ying,JIN Chang-Qing.High Temperature and High Pressure Synthesis and Study of 0212-Type Ca3Cu2O4+δCl2-y[J].Chinese Journal of High Pressure Physics,2007,21(1):15-19. |
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| Authors: | YANG Da-Xiao LIU Qing-Qing GAO Wei-Bo YU Wen LI Feng-Ying JIN Chang-Qing |
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| Affiliation: | 1. Institute of Physics, Chinese Academy of Sciences, Beijing 100080, China;2. University of Science &; Technology of Beijing, Beijing 100083, China |
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| Abstract: | Using the apical oxygen doping mechanism, i. e. a partial substitution of divalence O for the monovalence Cl, we synthesized Ca3Cu2O4+δCl2-y with Ag2O under high temperature and high pressure. From X-ray diffraction composition analysis, we confirmed that Ca3Cu2O4+δCl2-y crystallizes into a 0212 structure. With increasing the content of Ag2O, we found that lattice parameters a shrinked but c increased. It suggested that it should be hole doping. We also investigated the temperature dependence of the electrical resistivity and DC magnetic susceptibility for two samples, but we didn't observe superconductivity. It maybe resulted from the too low density of hole carrier. |
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| Keywords: | high temperature high pressure synthesis apical oxygen doping oxychloride cuprate |
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