| NdNi2Ge2化合物的结构和电磁输运性质 |
| |
| 引用本文： | 于洪飞,张鲁山,吴小会,郭永权.NdNi2Ge2化合物的结构和电磁输运性质[J].物理学报,2011,60(10):107306-107306. |
| |
| 作者姓名： | 于洪飞 张鲁山 吴小会 郭永权 |
| |
| 作者单位： | 华北电力大学能源动力与机械工程学院,北京 102206 |
| |
| 摘 要： | 利用非自耗真空电弧熔炼法制备了NdNi2Ge2化合物样品,采用X射线粉末衍射技术和Rietveld全谱拟合分析方法测定了其晶体结构. 结果显示该化合物的空间群为I4/mmm,点阵参数为:a=4.120(1),c=9.835(0),Z=2,Nd原子占据2a晶位,Ni原子占据4d晶位,Ge原子占据4e晶位. NdNi2Ge2化合物呈现顺磁性,应用居里-外斯定律拟合计算得到居里-外斯常数为25.8,居里-外斯温度为6.24 K. 有效势磁矩为3.69μB,这与理论计算Nd3+的磁矩相符,表明磁矩主要源于Nd3+. 电阻率变化范围为0.3 Ω ·μm-1-1 Ω ·μm,电阻曲线拟合显示NdNi2Ge2呈半金属性.
关键词：
2Ge2')" href="#">NdNi2Ge2
Rietveld结构精修
电磁输运
|
| 关 键 词： | NdNi2Ge2 Rietveld结构精修 电磁输运 |
| 收稿时间： | 2010-12-21 |
Structure and electromagnetic transport properties of compound NdNi2Ge2 |
| |
| Yu Hong-Fei,Zhang Lu-Shan,Wu Xiao-Hui and Guo Yong-Quan.Structure and electromagnetic transport properties of compound NdNi2Ge2[J].Acta Physica Sinica,2011,60(10):107306-107306. |
| |
| Authors: | Yu Hong-Fei Zhang Lu-Shan Wu Xiao-Hui and Guo Yong-Quan |
| |
| Institution: | School of Energy Power and Mechanical Engineering, North China Electric Power University, Beijing 102206, China;School of Energy Power and Mechanical Engineering, North China Electric Power University, Beijing 102206, China;School of Energy Power and Mechanical Engineering, North China Electric Power University, Beijing 102206, China;School of Energy Power and Mechanical Engineering, North China Electric Power University, Beijing 102206, China |
| |
| Abstract: | The sample of compound NdNi2Ge2 is prepared by arc melting. The crystal structure is analyzed using powder X-ray diffraction and refined with Rietveld is method. It is shown that NdNi2Ge2 intermetallic compound crystallizes into a tetragonal structure with space group of I/4mmm and its lattice constant is a=4.120(1),c=9.835(0), Z=2. Nd atoms occupy 2a positions, Ni atoms 4d positions and Ge atom 4e positions. NdNi2Ge2 intermetallic compound has a Curie-Weiss constant of 25.8 and Curie-Weiss temperature of 6.24 K. The effective magnetic moment is 3.69μB, which is very close to that of Nd3+. It implies that the magnetic moment originates mainly from Nd3+ ion. The resistivity varies from 0.3 Ω ·μm—1.1 Ω ·μm. Fitting results show that this intermetallic compound is semimetal. |
| |
| Keywords: | NdNi2Ge2 Rietveld refinement electromagnetic transport |
| 本文献已被 CNKI 万方数据 等数据库收录！ |
| 点击此处可从《物理学报》浏览原始摘要信息 |
| 点击此处可从《物理学报》下载免费的PDF全文 |
|
