Local lattice dynamics and negative thermal expansion in crystals
The investigations on the origin of negative thermal expansion (NTE) in crystals can greatly benefit from the joint use of Bragg diffraction and extended x-ray absorption fine structure (EXAFS). In this paper, the relative merits of the two techniques are critically discussed, and recent results on...
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| Veröffentlicht in: | Journal of physics. Conference series 2007-12, Vol.92 (1), p.012153 |
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| creator | Fornasini, P Sanson, A Vaccari, M Artioli, G Dapiaggi, M |
| description | The investigations on the origin of negative thermal expansion (NTE) in crystals can greatly benefit from the joint use of Bragg diffraction and extended x-ray absorption fine structure (EXAFS). In this paper, the relative merits of the two techniques are critically discussed, and recent results on CuCl (zincblende structure) and Cu2O and Ag2O (cuprite structure) are compared. The tension effect giving rise to NTE can be correlated to the anisotropy of the mean square relative displacements. |
| doi_str_mv | 10.1088/1742-6596/92/1/012153 |
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| subjects | Anisotropy Copper chloride Crystal lattices Fine structure Physics Thermal expansion X ray absorption Zincblende |
| title | Local lattice dynamics and negative thermal expansion in crystals |
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