The structure of filled skutterudites and the local vibration behavior of the filling atom

详细信息    查看全文

• 作者：Xiaojuan Zhou^a ; ^b ; ^c ; Peng-an Zong^d ; ^e ; Xihong Chen^e ; Juzhou Tao^a ; ^b ; ^{taoj@ihep.ac.cn} ; He Lin^f ; ^{linhe@sinap.ac.cn}
• 关键词：Atomic pair distribution function ; Extended x-ray absorption fine structure ; Local vibration
• 刊名：Physica B: Condensed Matter
• 出版年：2017
• 出版时间：15 February 2017
• 年：2017
• 卷：507
• 期：Complete
• 页码：131-133
• 全文大小：450 K
• 卷排序：507

文摘

Both of atomic pair distribution function (PDF) and extended x-ray absorption fine structure (EXAFS) experiments have been carried out on unfilled and Yb-filled skutterudites YbxCo4Sb12 (x=0, 0.15, 0.2 and 0.25) samples. The structure refinements on PDF data confirm the large amplitude vibration of Yb atom and the dependence of Yb vibration amplitude on the filling content. Temperature dependent EXAFS experiment on filled skutterudites have been carried out at Yb LⅢ-edge in order to explore the local vibration behavior of filled atom. EXAFS experiments show that the Einstein temperature of the filled atom is very low (70.9 K) which agrees with the rattling behavior.