Poster (Panel discussion)

FZJ-2016-05515

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png High-pressure studies on filled and unfilled skutterudites

Alexeev, P. (Corresponding author)FZJ* ; Glazyrin, K.DESY* ; Sergueev, I.DESY* ; Bednarcik, J.DESY* ; Hermann, R.FZJ*

2016

Abstract: Skutterudites are an interesting class of host-guest structure thermoelectric materials. It is possible to tune the transport properties of skutterudites in a wide range by modification of structure and doping. The presence of the large cavities in the structure and the recently proposed self-insertion mechanism make investigations of the high-pressure behavior of skutterudites very interesting. We present compressibility studies on the unfilled CoSb$_3$ and FeSb$_3$ skutterudites, as well on the filled Tl$_0.8$FeCo$_3$Sb$_12$ skutterudite. The studies were carried out by high-pressure synchrotron radiation diffraction. A third order Birch-Murnaghan isothermal equation of state was fitted to the experimental data between ambient pressure and 34 GPa for CoSb$_3$, 14 GPa for FeSb$_3$, and up to 31.4 GPa for Tl$_0.8$FeCo$_3$Sb$_12$.

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Contributing Institute(s):

1. Streumethoden (JCNS-2)
2. Deutsches Elektronen-Synchrotron (DESY)
3. JARA-FIT (JARA-FIT)
4. Streumethoden (PGI-4)

Research Program(s):

1. 6G3 - PETRA III (POF3-622) (POF3-622)
2. 144 - Controlling Collective States (POF3-144) (POF3-144)
3. 524 - Controlling Collective States (POF3-524) (POF3-524)
4. 6212 - Quantum Condensed Matter: Magnetism, Superconductivity (POF3-621) (POF3-621)
5. 6213 - Materials and Processes for Energy and Transport Technologies (POF3-621) (POF3-621)
6. 6G4 - Jülich Centre for Neutron Research (JCNS) (POF3-623) (POF3-623)

Appears in the scientific report 2016

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