| B位Co掺杂对Sr14Cu24O41的结构和电输运的影响 |
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| 引用本文： | 林颖,魏伟,熊锐,胡妮,汪丽莉,余祖兴,汤五丰,石兢.B位Co掺杂对Sr14Cu24O41的结构和电输运的影响[J].低温物理学报,2007,29(4). |
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| 作者姓名： | 林颖 魏伟 熊锐 胡妮 汪丽莉 余祖兴 汤五丰 石兢 |
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| 作者单位： | 1. 武汉大学,物理系声光材料与器件教育部重点实验室,武汉,430072
2. 武汉大学,物理系声光材料与器件教育部重点实验室,武汉,430072;中国科学院国际材料物理中心,沈阳,110016 |
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| 摘 要： | 采用固相反应法制备了系列Sr14(Cu1-xCox)24O41(x=0,0.02,0.06,0.1,0.14,0.18)的样品,X-射线衍射结果显示所有样品均为单相,且Co的掺杂几乎不改变样品的晶格常数,电子衍射和X-射线光电子能谱的测量结果证实Co替代的是链上的Cu原子;电输运的测量显示,Co掺杂样品表现为半导体行为,且渡越温度T 随掺杂量的增加逐渐减小.
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| 关 键 词： | 强关联 自旋梯状结构 电输运 |
EFFECT OF Co SUBSTITUTION ON STRUCTURE AND ELECTRIC TRANSPORT OF Sr14Cu24O41 |
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| Lin Ying,Wei Wei,Xiong Rui,Hu Ni,Wang Li-li,Yu Zu-xing,Tang Wu-feng,Shi Jing.EFFECT OF Co SUBSTITUTION ON STRUCTURE AND ELECTRIC TRANSPORT OF Sr14Cu24O41[J].Chinese Journal of Low Temperature Physics,2007,29(4). |
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| Authors: | Lin Ying Wei Wei Xiong Rui Hu Ni Wang Li-li Yu Zu-xing Tang Wu-feng Shi Jing |
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| Abstract: | A series samples of Sr14(Cu1-xCox)24O41(x=0,0.02,0.06,0.1,0.14,0.18) were prepared by standard solid-state reaction. X-ray diffraction measurements show that all the samples are single-phase and Co dopant hardly changes their lattice parameters, electron diffraction experiments and X-ray photo-emission spectroscopy measurements reveal that Co ions substitute Cu ions in the chain. The measurements of electric transport show that all Co doped samples behave as semiconductors and the cross-over temperature T decreases as the Co doped content increases. |
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| Keywords: | Sr14Cu24O41 |
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