Structural effects at the ferromagnetic to antiferromagnetic phase transition in Ce(Fe1-xCox)2
Structural effects at the ferromagnetic to antiferromagnetic phase transition in Ce(Fe1-xCox)2
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Ce(Fe1-xCox)2 中铁磁到反铁磁相变的结构效应
DOI：
10.1088/0305-4608/18/11/021
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发表时间：
1988
期刊：
影响因子：
--
通讯作者：
O. Moze
中科院分区：
文献类型：
--
作者：
S. Kennedy;A. Murani;B. Coles;O. Moze
继最近在x<0.3的Ce(Fe1-xCox)2化合物中发现新的磁相变之后，作者报告了在卢瑟福阿普尔顿实验室使用HRPD对x=0.20的化合物进行中子粉末衍射研究的结果。Rietveld结构细化表明，铁磁相为立方Laves相（α =90°），但在TN约=85 K以下的低温反铁磁相在18 K时变形为α =90.20+或0.01°的菱形对称。这种扭曲与细胞体积在TN处的不连续相吻合。
Following the recent discovery of a new magnetic phase transition in the Ce(Fe1-xCox)2 compounds for which x<0.3, the authors report the results of a neutron powder diffraction study on a compound with x=0.20 using HRPD at the Rutherford Appleton Laboratories. Rietveld structure refinements show that the ferromagnetic phase is the cubic Laves phase ( alpha =90 degrees ), but the low-temperature antiferromagnetic phase below TN approximately=85 K is distorted to rhombohedral symmetry with alpha =90.20+or-0.01 degrees at 18 K. This distortion coincides with a discontinuity in cell volume at TN.