5f Magnetism studied in complex intermetallic U-based hydrides

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• 作者：L. Havela ; K. Miliyanchuk ; A.V. Kolomiets ; L.C.J. Pereira ; A.P. Gonç ; alves ; E. Š ; antavá ; ; K. Prokeš
• 关键词：Actinide alloys and compounds ; Hydrogen absorbing materials ; Magnetisation ; Heat capacity ; Neutron diffraction
• 刊名：Journal of Alloys and Compounds
• 出版年：2007
• 期刊代码：45_09258388
• 类别：ms
• 出版时间：31 October 2007
• 卷：446-447
• 期：Complete
• 页码：606-609
• 文件大小：171 K

摘要

Hydrogen absorption in uranium ternary intermetallic compounds typically increases ordering temperatures and magnetic moments. The case of URuSn hydride, which does not behave accordingly, can be related to specific H positions revealed by neutron diffraction on deuterides. Tuning through the onset of magnetic ordering by means of H absorption was found for the U₂T₂X compounds as U₂Co₂Sn. For U₂Ni₂SnD_1.8, we demonstrated that the anisotropic lattice expansion leads to U moments reorientation, as a result of hybridisation-induced two-ion anisotropy, with respect to U₂Ni₂Sn, in which the Up://www.sciencedirect.com/scidirimg/entities/sbnd" alt="single bond" border=0>U coordination is poised between two regimes.