Journal Article

PreJuSER-16384

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Lattice dynamics in the FeSb3 skutterudite

Möchel, A.FZJ* ; Sergueev, I. ; Nguyen, N. ; Long, G. J. ; Grandjean, F. ; Johnson, D. C. ; Hermann, R.FZJ*

2011
APS College Park, Md.

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Please use a persistent id in citations: http://hdl.handle.net/2128/10920  doi:10.1103/PhysRevB.84.064302

Abstract: 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.

Keyword(s): J

Note: We thank Dr. H.-C. Wille and D. Bessas for their support during the NIS measurements and Dr. J. C. Feldman for making his calculation data<SUP>16</SUP> available. We thank Dr. B. C. Sales for providing the CoSb<INF>3</INF> and EuFe<INF>4</INF>Sb<INF>12</INF> samples.<SUP>17</SUP> The European Synchrotron Radiation Facility and the Advanced Photon Source are acknowledged for provision of synchrotron radiation beam time at the nuclear resonance station ID18 and ID22N and the high-energy station 6-ID-D, respectively. R. H. acknowledges support from the Helmholtz University Young Investigator Group "Lattice Dynamics in Emerging Functional Materials". F. G. acknowledges the financial support of the Fonds National de la Recherche Scientifique, Belgium (Grants No. 9.456595 and No. 1.5.064.05). The research at the University of Oregon was funded by the National Science Foundation under Grant No. DMR 0907049 and supported in part by ONR Grant No. N00014-07-1-0358 and by the Army Research Laboratory under Agreement No. W911NF-07-2-0083.

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Contributing Institute(s):

1. Streumethoden (PGI-4)
2. Streumethoden (JCNS-2)
3. Jülich-Aachen Research Alliance - Fundamentals of Future Information Technology (JARA-FIT)

Research Program(s):

1. Grundlagen für zukünftige Informationstechnologien (P42)
2. Großgeräte für die Forschung mit Photonen, Neutronen und Ionen (PNI) (P55)

Appears in the scientific report 2011

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