| 准一维梯状结构化合物Sr14-xCaxCu24O41磁化率随外磁场的变化性质 |
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| 引用本文： | 汪丽莉,巍伟,熊锐,胡妮,林颖,朱本鹏,黄平,汤五丰,余祖兴,汤征,石兢.准一维梯状结构化合物Sr14-xCaxCu24O41磁化率随外磁场的变化性质[J].低温物理学报,2007,29(3):173-178. |
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| 作者姓名： | 汪丽莉 巍伟 熊锐 胡妮 林颖 朱本鹏 黄平 汤五丰 余祖兴 汤征 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： | 采用常规的固相反应方法制备了Sr14-xCaxCu24O41系列样品(x=0.0,3.5,6.0,8.4).X-ray衍射结果显示,所有样品均为单相,并且随着掺杂离子含量的增加,样品的晶格常数a,b,c的值均逐渐减小.在10 K～200 K温度范围内测量了不同磁场强度(H=1 T,3 T,5 T)Ca掺杂样品(x=0,3.5,6,8.4)的磁化率温度曲线.磁化率测量结果表明,磁场的增强导致居里-外斯贡献降低,并且导致自旋能隙变小.进一步拟合结果表明,参与磁化率贡献的自旋数目随Ca掺杂浓度的变化不明显,而随磁场强度的增大而减小.
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| 关 键 词： | 强关联 自旋梯状结构 磁化率 |
| 修稿时间： | 2007-03-012007-04-18 |
MAGNETIC SUSCEPTIBILITY IN DIFFERENT FIELD OF QUASI-ONE DIMENSIONAL 1/2S SPIN LADDER COMPOUND Sr14-xCaxCu24O41 |
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| Wang Li-li,Wei Wei,Xiong Rui,Hu Ni,Lin Yin,ZHu Ben-peng,Huang Pin,Tang Wu-feng,Yu Zu-xing,Tang ZHeng,SHi Jing.MAGNETIC SUSCEPTIBILITY IN DIFFERENT FIELD OF QUASI-ONE DIMENSIONAL 1/2S SPIN LADDER COMPOUND Sr14-xCaxCu24O41[J].Chinese Journal of Low Temperature Physics,2007,29(3):173-178. |
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| Authors: | Wang Li-li Wei Wei Xiong Rui Hu Ni Lin Yin ZHu Ben-peng Huang Pin Tang Wu-feng Yu Zu-xing Tang ZHeng SHi Jing |
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| Institution: | 1. Department of Physics and Key Laboratory of Acoustic and Photonic Material and Dvice of Ministry of Education, Wuhan University, Wuhan 430072; 2. International center for materials physics, Shen yang110015 |
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| Abstract: | Series samples of spin ladder compound Sr14-xCaxCu24O41(x=0.0,3.5,6.0,8.4) were prepared by conventional solid-state reaction . X-ray diffraction shows that all samples are single phase, and the lattice parameters a, b, c decreases gradually with the increasing of Ca doping. The measurement of magnetic susceptibility between 10 K and 200 K show that the Curie-Weiss contribution and the energy of the spin gap in the chain decreasing with the increasing of the external magnetic field for Ca doping samples. The fitting results consumed that,as the filed increases, the spins contributed to susceptibility reduces distinctly. |
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| Keywords: | Sr14-xCaxCu24O41 |
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