MAGNETIC-PROPERTIES OF NEPTUNIUM AND PLUTONIUM HYDRIDES

被引:34
作者
ALDRED, AT
CINADER, G
LAM, DJ
WEBER, LW
机构
[1] Soreq Nuclear Research Center, Yavne
来源
PHYSICAL REVIEW B | 1979年 / 19卷 / 01期
关键词
D O I
10.1103/PhysRevB.19.300
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
The magnetic susceptibility and magnetization of NpHx and PuHx (2.0≤x≤3.0) compounds have been measured between 4 and 700 K. The susceptibility of the NpHx compounds is weakly temperature dependent and a crystal-field calculation based on the 5f4(Np3+) ground-state configuration was in reasonable agreement with the experimental results for the dihydride (cubic CaF2-type structure). The cubic plutonium dihydride has a susceptibility maximum, indicative of antiferromagnetic ordering, at 30 K. Cubic plutonium compounds with higher hydrogen concentrations order ferromagnetically with transition temperatures that increase with an increase in x and reach a maximum of 66 K at x=2.7. The hexagonal plutonium trihydride becomes ferromagnetic at 101 K. Although the details of the ordering scheme and a complete crystal-field calculation await a neutron-scattering study, it appears that the most likely ground-state configuration is 5f5(Pu3+). © 1979 The American Physical Society.
引用
收藏
页码:300 / 305
页数:6
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