Magnetic structure, magnetostriction, and magnetic transitions of the Laves-phase compound NdCO2
文献类型：期刊论文
| 作者 | Z. W. Ouyang ; F. W. Wang ; Q. Huang ; W. F. Liu ; Y. G. Xiao ; J. W. Lynn ; J. K. Liang ; G. H. Rao |
| 刊名 | Physical Review B
 |
| 出版日期 | 2005 |
| 卷号 | 71期号:6 |
| 关键词 | itinerant-electron metamagnetism neutron powder-diffraction intermetallic compounds exchange heavy light hoco2 order |
| ISSN号 | 1098-0121 |
| 中文摘要 | The crystal and the magnetic structures as well as magnetostriction of the Laves-phase compound NdCo2 are investigated by means of temperature-dependent high-resolution neutron-powder diffraction. The compound crystallizes in the cubic Laves phase C15 structure at high temperature, undergoes a tetragonal distortion (space group I4l/amd) around T(C)approximate to 100 K and an orthorhombic distortion (space group Fddd) at T 42 K. The temperature dependence of lattice constants, magnetostriction constant, and magnetic moment indicate that the magnetic and structural transitions are second order in the vicinity of T-C and are first-order around 42 K. Refinements of magnetic structure reveal that the Nd moment distinctly exhibits an abrupt increase at the first-order transition and the easy magnetization direction of the compound changes from [001] in the tetragonal lattice to [011] in the orthorhombic lattice, indicating a strong coupling between crystal structure and magnetic properties at zero field. Analysis of the temperature dependence of bondlength suggests a strong magnetic exchange striction in the tetragonal structure and that the abrupt increase of the Nd moment is attributed essentially to a change in crystal electric field. Field-dependent neutron diffraction reveals a decoupling of the magnetic and structural transitions under relatively modest magnetic fields. |
| 原文出处 | |
| 公开日期 | 2012-04-14 |
| 源URL | [http://ir.imr.ac.cn/handle/321006/34991]  |
| 专题 | 金属研究所_中国科学院金属研究所 |
| 推荐引用方式 GB/T 7714 | Z. W. Ouyang,F. W. Wang,Q. Huang,et al. Magnetic structure, magnetostriction, and magnetic transitions of the Laves-phase compound NdCO2[J]. Physical Review B,2005,71(6). |
| APA | Z. W. Ouyang.,F. W. Wang.,Q. Huang.,W. F. Liu.,Y. G. Xiao.,...&G. H. Rao.(2005).Magnetic structure, magnetostriction, and magnetic transitions of the Laves-phase compound NdCO2.Physical Review B,71(6). |
| MLA | Z. W. Ouyang,et al."Magnetic structure, magnetostriction, and magnetic transitions of the Laves-phase compound NdCO2".Physical Review B 71.6(2005). |
入库方式： OAI收割
来源：金属研究所
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