Hostname: page-component-cd9895bd7-8ctnn Total loading time: 0 Render date: 2024-12-27T02:24:36.033Z Has data issue: false hasContentIssue false
  • English
  • Français

Ultrasound Studies of Clathrate Thermoelectrics

Published online by Cambridge University Press:  01 February 2011

Veerle Keppens ,
Brian. C. Sales ,
David Mandrus ,
Bryan C. Chakoumakos  and
Christiane Laermans
Veerle Keppens
Affiliation:
National Center for Physical Acoustics, University of Mississippi, Oxford, MS 38677, U.S.A.
Brian. C. Sales
Affiliation:
Solid State Division, Oak Ridge National Laboratory, Oak Ridge, TN 37831–6056, U.S.A.
David Mandrus
Affiliation:
Solid State Division, Oak Ridge National Laboratory, Oak Ridge, TN 37831–6056, U.S.A.
Bryan C. Chakoumakos
Affiliation:
Solid State Division, Oak Ridge National Laboratory, Oak Ridge, TN 37831–6056, U.S.A.
Christiane Laermans
Affiliation:
Dept. of Physics, Katholieke Universiteit Leuven, B-3001 Leuven, Belgium.
Get access

Abstract

Resonant Ultrasound Spectroscopy and low-temperature ultrasonic attenuation measurements are reported for filled and unfilled skutterudites and for Ge-clathrates. These data reveal that an unusual elastic behavior complements the thermal properties of the filled skutterudites and indicate the presence of low-energy vibrational modes. The attenuation at low-temperatures in the single-crystalline Ge-clathrate is glasslike and can be described by the same phenomenological Tunneling Model that has been developed to describe the low-temperature properties of amorphous solids.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 626: Symposium Z – Thermoelectric Materials 2000 - The Next Generation Materials for Small-Scale Refrigeration and Power Generation Applications , 2000 , Z13.3
Copyright
Copyright © Materials Research Society 2000

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

REFERENCES

1. See, for example, Sales, B. C. et al., Phys. Rev. B 56, 15081 (1997) and references therein.Google Scholar
2. Nolas, G. S., Cohn, J. L., Slack, G. A., and Schujman, S. B., Appl. Phys. Lett. 73, 178 (1998).Google Scholar
3. Cohn, J. L. et al., Phys. Rev. Lett. 82, 779–782 (1999).Google Scholar
4. Chakoumakos, B. C., Sales, B. C., Mandrus, D., and Nolas, G. S., J. Alloys and Compounds, in press.Google Scholar
5. Migliori, A. et al., Physica B 183, 1 (1993).Google Scholar
6. Varshni, P., Phys. Rev. B 2, 3952 (1973).Google Scholar
7. Keppens, V. et al., Nature 395, 876 (1998).Google Scholar
8. Feldman, J., unpublished results.Google Scholar
9. Laermans, C., Keppens, V., and Weeks, R., Phys. Rev. B, 55, 2701 (1997).Google Scholar
10. Anderson, P. W., Halperin, B. I., and Varma, C. M., Phil. Mag. 25, 1 (1972);Google Scholar
Phillips, W. A., J. Low Temp. Phys. 7, 351 (1972).Google Scholar
11. Keppens, V. et al., Phil. Mag. Lett, accepted for publication.Google Scholar