Back to Search Start Over

Negative thermal expansion of ReO3 in the extended temperature range

Authors :
Thomas C. Hansen
Paul F. Henry
Tapan Chatterji
Michela Brunelli
Source :
Applied physics letters 94, 241902 (2009). doi:10.1063/1.3155191
Publication Year :
2009
Publisher :
American Institute of Physics, 2009.

Abstract

We reported previously [T. Chatterji et al., Phys. Rev. B 78, 134105 (2008)] negative thermal expansion (NTE) in ReO3 in the limited temperature range from 2 to 220 K. Here we discovered NTE in ReO3 at higher-temperature region from 600 to 680 K. We determined the temperature variation in the lattice parameter and the unit cell volume of ReO3 by neutron diffraction. The temperature variation in the lattice parameter and the unit cell volume show two regions of NTE and two minima. We attribute the NTE of ReO3 to be the result of anharmonicity and anomalous softening of M3 phonon mode.

Details

Language :
English
Database :
OpenAIRE
Journal :
Applied physics letters 94, 241902 (2009). doi:10.1063/1.3155191
Accession number :
edsair.doi.dedup.....0a1c5d40e3615ed4d777a61a12d33764
Full Text :
https://doi.org/10.1063/1.3155191