Journal article
Heavily doped M1−xUxF2+2x fluorites studied by quasielastic neutron scattering(M=Ba) and specific heat measurements (M=Pb)
Nano-Microstructures in Materials, Materials Research Division, Risø National Laboratory for Sustainable Energy, Technical University of Denmark1
Materials Research Division, Risø National Laboratory for Sustainable Energy, Technical University of Denmark2
Risø National Laboratory for Sustainable Energy, Technical University of Denmark3
The thermal generation of defects in pure and doped Pb1−xUxF2+2x (x=0, 0.05and0.10) has been studied by specific heat measurements between 475 k and 875 k. A simple phenomenological mean field thermodynamic model has been developed and used to interpret the data. At low temperatures the result of doping is an increase of the thermally generated defect concentration; at high temperatures the effect is reversed.
The microscopic defect structure of Ba0.9U0.1F2.2 has been studied by diffuse quasielastic neutron scattering experiments at room temperature. The experimental observations are in good agreement with a model calculation based on a defect structure of 212-clusters.
| Language: | English |
|---|---|
| Year: | 1983 |
| Pages: | 543-548 |
| ISSN: | 18727689 and 01672738 |
| Types: | Journal article |
| DOI: | 10.1016/0167-2738(83)90292-8 |
