Magnetic structure, magnetostriction, and magnetic transitions of the Laves-phase compound NdCO2
文献类型：期刊论文
| 作者 | Ouyang, ZW ; Wang, FW ; Huang, Q ; Liu, WF ; Xiao, YG ; Lynn, JW ; Liang, JK ; Rao, GH |
| 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 |
| 通讯作者 | Ouyang, ZW: Chinese Acad Sci, Inst Phys, Beijing Natl Lab Condensed Matter Phys, POB 603, Beijing 100080, Peoples R China. |
| 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. |
| 收录类别 | SCI |
| 语种 | 英语 |
| 公开日期 | 2013-09-18 |
| 源URL | [http://ir.iphy.ac.cn/handle/311004/41431]  |
| 专题 | 物理研究所_物理所公开发表论文_物理所公开发表论文_期刊论文 |
| 推荐引用方式 GB/T 7714 | Ouyang, ZW,Wang, FW,Huang, Q,et al. Magnetic structure, magnetostriction, and magnetic transitions of the Laves-phase compound NdCO2[J]. PHYSICAL REVIEW B,2005,71(6). |
| APA | Ouyang, ZW.,Wang, FW.,Huang, Q.,Liu, WF.,Xiao, YG.,...&Rao, GH.(2005).Magnetic structure, magnetostriction, and magnetic transitions of the Laves-phase compound NdCO2.PHYSICAL REVIEW B,71(6). |
| MLA | Ouyang, ZW,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：物理研究所
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