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Full Record Details
Persistent URL
http://purl.org/net/epubs/work/34001
Record Status
Checked
Record Id
34001
Title
Structural changes induced by Ce filling in partially filled skutterudites
Contributors
L C Chapon (ISIS, CCLRC)
,
L Girard (LPMC, Montpellier, France)
,
A Haidoux (LPMC, Montpellier, France)
,
R I Smith (ISIS, CCLRC)
,
D Ravot (LPMC, Montpellier, France)
Abstract
The structural properties of the Ce<sub>δ</sub>Fe<sub>x</sub>Ni<sub>x</sub>Sb<sub>12</sub> series with 0.06 δ 0.72 have been determined by neutron powder diffraction in the temperature range 10?300 K. Large isotropic atomic displacement parameters are observed for the cerium atom throughout the series, however with two distinct origins. The first term, purely dynamic, is well described as an Einstein oscillator and has essentially no dependence with the filling fraction δ and the lattice parameter. A vibrational frequency of 55(2) <sup>-1</sup> fitted the experimental data in the entire phase diagram. The second contribution is essentially static andwell evidenced by a large residual displacement parameter extrapolated to 0 K. This latter term does depend strongly on δ and is maximum at around δ = 0.5, representing almost 50% of the room temperature value. A number of structural changes of the Sb sublattice are correlated with the disorder of Ce as well as disorder on the Fe/Ni sublattice.
Organisation
CCLRC
,
ISIS
,
ISIS-POLARIS
Keywords
Physics
,
ISIS 2005
Funding Information
Related Research Object(s):
Licence Information:
Language
English (EN)
Type
Details
URI(s)
Local file(s)
Year
Journal Article
J Phys-Condens Mat
17 (2005): 3525-3535.
doi:10.1088/0953-8984/17/23/005
2005
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