Quenching rattling modes in skutterudites with pressure

High Pressure Synthesis of p-Type CeyFe4−xCoxSb12 Skutterudites

Co-substituted p-Type CeFe4-xCoxSb12 skutterudites were successfully synthesized with a high pressure synthesis method. The structure, composition, and thermoelectric properties were investigated. The obtained CeyFe4-xCoxSb12 samples show the skutterudite structure of I m 3 ¯ symmetry. The hole concentration decreases with elevating Co substitution level, leading to increased Seebeck coefficien...

Coupled vibrational modes in multiple-filled skutterudites and the effects on lattice thermal conductivity reduction

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Dumbbell rattling in thermoelectric zinc antimony.

Inelastic neutron scattering measurements on thermoelectric Zn4Sb3 reveal a dominant soft local phonon mode at 5.3(1) meV. The form factor of this local mode is characteristic for dumbbells vibrating preferably along the dumbbell axis and can be related to a vibration of Sb dimers along the c axis. The Lorentzian width of the mode corresponds to short phonon lifetimes of 0.39(2) ps and yields a...

Evidence for rattling behavior of the filler atom „L... in the filled skutterudites LT4X12 „L=Ce,Eu,Yb; T=Fe,Ru; X=P,Sb... from EXAFS studies

D. Cao,1,3 F. Bridges,1 P. Chesler,1 S. Bushart,1 E. D. Bauer,2 and M. B. Maple2 1Physics Deparment, University of California, Santa Cruz, California 95064, USA 2Department of Physics and Institute of Pure and Applied Physical Science, University of California, San Diego, La Jolla, California 92093, USA 3MS K764, Los Alamos National Laboratory, Los Alamos, New Mexico 87545, USA (Received 24 Oct...

Positive pressure ventilation. Alternate modes.