Characteristic metamagnetic transitions in NpRhGa5 and UPtGa5
Characteristic metamagnetic transitions in NpRhGa5 and UPtGa5
复制标题
NpRhGa5 和 UPtGa5 中的特征变磁转变
DOI:
10.1088/1742-6596/51/1/051
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发表时间:
2006
期刊:
影响因子:
--
通讯作者:
Y. Ōnuki
中科院分区:
文献类型:
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作者:
K. Sugiyama;H. Nakashimaa;T. Yamada;D. Aoki;S. Ikeda;Y. Haga;E. Yamamoto;A. Nakamura;Y. Homma;Y. Shiokawa;K. Kindo;M. Hagiwara;Y. Ōnuki
We measured the high-field magnetization up to 55 T and constructed a magnetic phase diagram for a transuranium antiferromagnet NpRhGa5 with the tetragonal structure. The magnetization at 4.2 K for an easy-axis H//[100] indicates a metamagnetic transition with a sharp step at Hc = 26 T and saturates above Hs = 38 T, reaching 0.43 μB/Np at Hs. On the other hand, the magnetization saturates at Hs = 28 T for a hard-axis H//[001], reaching 0.44 μB/Np at Hs. The magnetization indicated that the magnetic moment reduces from 0.96 μB/Np at zero field to 0.44 μB/Np at the saturation field as a function of magnetic field. These experimental results in NpRhGa5 are compared with the simple magnetism in UPtGa5with the similar antiferromagnetic structure.