B位Co掺杂对Sr14Cu24O41的结构和电输运的影响

低温物理学报 , 2007, 29(4): 263-269. doi: 10.3969/j.issn.1000-3258.2007.04.003

B位Co掺杂对Sr14Cu24O41的结构和电输运的影响

林颖 ^1, , 魏伟 ^2, , 熊锐 ^3, , 胡妮 ^4, , 汪丽莉 ^5, , 余祖兴 ^6, , 汤五丰 ^7, , 石兢 ^8,

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

3.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

4.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

5.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

6.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

7.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

8.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

关键词：强关联 , Sr14Cu24O41 , 自旋梯状结构 , 电输运

EFFECT OF Co SUBSTITUTION ON STRUCTURE AND ELECTRIC TRANSPORT OF Sr14Cu24O41

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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