Low thermal conductivity of the negative thermal expansion material, HfMo2O8
dc.contributor.author | Kennedy, Catherine A. | en_US |
dc.contributor.author | White, Mary Anne | en_US |
dc.contributor.author | Wilkinson, Angus P. | en_US |
dc.contributor.author | Varga, Tamas | en_US |
dc.date.accessioned | 2013-08-23T15:58:40Z | |
dc.date.available | 2013-08-23T15:58:40Z | |
dc.date.issued | 2007-04 | en_US |
dc.description.abstract | The thermal conductivity of the cubic polymorph of hafnium molybdate, HfMo2O8, was determined over the temperature range of 2-400 K. The values of thermal conductivity were low (0.64 +/- 0.15 W m(-1) K-1 at T=300 K for a fully dense sample), with a positive temperature coefficient throughout the temperature range examined. Calculations of the theoretical minimum thermal conductivity and the effective phonon mean free path show that the heat-carrying phonons are nearly fully coupled in HfMo2O8, consistent with the rather large magnitude of its Gruneisen parameter. The low-frequency optic modes which lead to negative thermal expansion in HfMo2O8 are likely responsible for the low thermal conductivity. (c) 2007 American Institute of Physics. | en_US |
dc.identifier.citation | Kennedy, Catherine A., Mary Anne White, Angus P. Wilkinson, and Tamas Varga. 2007. "Low thermal conductivity of the negative thermal expansion material, HfMo2O8." Applied Physics Letters 90(15): 151906-151906. | en_US |
dc.identifier.issn | 0003-6951 | en_US |
dc.identifier.issue | 15 | en_US |
dc.identifier.startpage | 151906 | en_US |
dc.identifier.uri | http://dx.doi.org/10.1063/1.2721860 | en_US |
dc.identifier.uri | http://hdl.handle.net/10222/36167 | |
dc.identifier.volume | 90 | en_US |
dc.relation.ispartof | Applied Physics Letters | en_US |
dc.title | Low thermal conductivity of the negative thermal expansion material, HfMo2O8 | en_US |
dc.type | article | en_US |
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