EXAFS and Te spectroscopy study of the Yb1−xEuxTe, Pb1−xEuxTe and Yb1−xGdxTe solid solutions期刊界 All Journals 搜尽天下杂志传播学术成果专业期刊搜索期刊信息化学术搜索

EXAFS and Te spectroscopy study of the Yb_1−xEu_xTe, Pb_1−xEu_xTe and Yb_1−xGd_xTe solid solutions

Authors:	S. Merah D. Ravot A. Percheron-Guegan J. Olivier-Fourcade J. C. Jumas A. Mauger P. Parent

Affiliation:	^a LCMSTR, UPR 209, CNRS, 1 pl. A. Briand, 92195, Meudon cedex, France ^b LPMC, UMR 5617, Université de Montpellier II, Sciences et Techniques du Languedoc, 2 pl. E. Bataillon, F-34095, Montpellier cedex 5, France ^c Laboratoire d'Accoustique et Optique de la Matière Condensée, CNRS, Université P. et M. Curie, Tour 13, case 86, 4; pl. Jussieu, 75252, Paris Cedex 05, France ^d Laboratoire pour l'Utilisation du Rayonnement Electromagnétique-LURE, batiment 209 D, Centre Universitaire, 91405, Orsay Cedex, France

Abstract:	We report EXAFS (Extended X-Ray Absorption Fine Structure) measurements on three solid solutions of rare-earth monotelluride in order to measure the x-dependence of the cation-anion distance and Debye-Waller factor. We find Yb_1−xEu_xTe is an ideal solid solution with a bimodal distribution of distances, accommodated by the Te sublattice, at contrast with the two other solid solutions Pb_1−xEu_xTe and Yb_1−xGd_xTe. The anomalous behaviour of the EXAFS parameters in the last system is related to the shallow nature of the Gd donor.

Keywords:	Rare earth monotellurides Solid solution EXAFS Transport properties
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