Synchrotron radiation diffraction study of YbInCu4
Synchrotron radiation diffraction study of YbInCu4
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YbInCu4 的同步辐射衍射研究
DOI：
10.1143/jjap.50.05fc10
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发表时间：
2011
期刊：
影响因子：
--
通讯作者：
K. Sugimoto
中科院分区：
文献类型：
--
作者：
Y. Utsumi;H. Sato;C. Moriyoshi;Y. Kuroiwa;H. Namatame;M. Taniguchi;K. Hiraoka;K. Kojima;K. Sugimoto
利用同步辐射衍射技术研究了YbInCu 4单晶在42 K温度下的一级跃迁引起的结构变化。Yb-Cu和In-Cu的原子间距离突然增加低于T V，以下的晶格膨胀与C15 b型晶体结构没有变化。我们发现，在晶体中形成Cu 4团簇的Cu离子之间的距离在整个价态转变中几乎不变。Cu 4团簇的热旋转运动在T-V处没有发生突变.
The structural change of an YbInCu 4 single crystal has been investigated associated with the first-order valence-transition at T V= 42 K using synchrotron radiation diffraction. The Yb–Cu and In–Cu interatomic distances abruptly increase below T V, following the lattice expansion with no change in the C15b-type crystal structure. We find that the distance between Cu ions forming the Cu 4 cluster in the crystal is almost unchanged across the valence transition. No abrupt change in the thermal rotational motion of the Cu 4 cluster is observed at T V.