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Negative thermal expansion of ReO3 in the extended temperature range
- 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.
- Subjects :
- Physics and Astronomy (miscellaneous)
Condensed matter physics
rhenium compounds
Chemistry
Phonon
Anharmonicity
Neutron diffraction
phonons
Atmospheric temperature range
lattice constants
Thermal expansion
Lattice constant
neutron diffraction
Negative thermal expansion
ddc:530
Softening
thermal expansion
Subjects
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