[en] Thin films of FeSb3 were characterized by electronic transport magnetometry, x-ray diffraction, Fe-57 and Sb-121 nuclear inelastic scattering, and Fe-57 Mossbauer spectroscopy. Resistivity and magnetometry measurements reveal semiconducting behavior with a 16.3(4) meV band gap and an effective paramagnetic moment of 0.57(6) mu(B) respectively. A systematic comparison of the lattice dynamics with CoSb3 and EuFe4Sb12 reveals that the Fe4Sb12 framework is softer than the Co4Sb12 framework, and that the observed softening and the associated lowering of the lattice thermal conductivity in the RFe4Sb12 filled skutterudites are not only related to the filler but also to the Fe4Sb12 framework.
Disciplines :
Physics
Author, co-author :
Moechel, A.
Sergueev, I.
Long, Gary J.
Grandjean, Fernande ; Université de Liège - ULiège > Département de physique > Département de physique
Johnson, D. C.
Hermann, Raphaël ; Université de Liège - ULiège > Département de chimie (sciences) > Département de chimie (sciences)
Nguyen, Ngoc; University of Oregon
Language :
English
Title :
Lattice dynamics in the FeSb3 skutterudite
Publication date :
2011
Journal title :
Physical Review
ISSN :
0031-899X
eISSN :
1536-6065
Publisher :
American Physical Society, Lancaster, United States - Pennsylvania