Chemical properties and thermopower of the new series of skutterudite Ce1-pYbpFe4Sb12

被引：42

作者：

Bérardan, D

Godart, C

Alleno, E

Berger, S

Bauer, E

机构：

[1] CNRS, ISCSA, LCMTR, F-94320 Thiais, France

[2] Vienna Univ Technol, Inst Solid State Phys, A-1040 Vienna, Austria

来源：

JOURNAL OF ALLOYS AND COMPOUNDS | 2003年 / 351卷 / 1-2期

基金：

奥地利科学基金会;

关键词：

rare earth compounds; transition metal compounds; thermoelectric; X-ray spectroscopy;

D O I：

10.1016/S0925-8388(02)01047-2

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

We report on sample preparation and electron microprobe analysis in the series Ce1-pYbpFe4Sb12 that shows that a solid solution exists between CeFe4Sb12 and YbFe4Sb12 for all compositions in the series. The valence states of Ce and Yb have been studied using X-ray absorption spectroscopy. Ce is trivalent throughout the series, whereas the Yb valence linearly changes from 2.16 for Yb0.93Fe4Sb12.08 to 2.71 for Ce0.85Yb0.05Fe4Sb12.06. The Seebeck coefficient was measured from 4 K to room temperature. It is enhanced by more than 20% at room temperature in Ce-Yb mixed compounds as compared to CeFe4Sb12 or YbFe4Sb12. (C) 2002 Elsevier Science B.V. All rights reserved.

引用

页码：18 / 23

页数：6