Neutron‐diffraction study of the insertion scheme of hydrogen in Nd2Fe14B
Neutron‐diffraction study of the insertion scheme of hydrogen in Nd2Fe14B
复制标题
DOI：
10.1063/1.360720
复制
发表时间：
1995-08
影响因子：
3.2
通讯作者：
O. Isnard;W. Yelon;S. Miraglia;D. Fruchart
中科院分区：
文献类型：
--
作者：
O. Isnard;W. Yelon;S. Miraglia;D. Fruchart
给出了在室温下对 Nd2Fe14BHx 系列进行的中子粉末衍射实验的结果。描述了晶格内氢（或氘）原子的位置。在分析Nd2Fe14B、Nd2Fe14BH、Nd2Fe14BH2、Nd2Fe14BH3和Nd2Fe14BH4的晶体结构后，提出了氢原子填充间隙位的方案。该填充方案与之前在其他 R2Fe14B 合金（特别是 R=Ce、Y、Ho、Er）上获得的方案进行了比较和讨论。所有这些成分的使用可以更好地理解通过插入氢来改变 Nd2Fe14B 结构的方式。还分析了最短铁-铁原子间距离的演变，并将其与磁性的变化联系起来。
Results are presented of a neutron powder diffraction experiment performed at room temperature on the Nd2Fe14BHx series. The location of the hydrogen (or deuterium) atoms within the crystal lattice is described. After an analysis of the crystal structure of Nd2Fe14B, Nd2Fe14BH, Nd2Fe14BH2, Nd2Fe14BH3, and Nd2Fe14BH4, a filling scheme of the interstitial sites by hydrogen atoms is proposed. This filling scheme is compared and discussed with that previously obtained on other R2Fe14B alloys in particular with R=Ce, Y, Ho, Er. The use of all these compositions provides a better understanding of the way the Nd2Fe14B structure is modified by insertion of hydrogen. The evolution of the shortest iron‐iron interatomic distances is also analyzed and related to the change in magnetism.