Rigid-ion potentials for SrF<sub>2</sub>, CaF<sub>2</sub> and GdF<sub>3</sub>
D Bingham; A N Cormack; C R A Catlow; D Bingham; Div. of Appl. Phys., CSIRO, Lindfield, NSW, Australia; A N Cormack; Div. of Appl. Phys., CSIRO, Lindfield, NSW, Australia; C R A Catlow; Div. of Appl. Phys., CSIRO, Lindfield, NSW, Australia
Журнал:
Journal of Physics: Condensed Matter
Дата:
1989-02-20
Аннотация:
Rigid-ion potentials have been developed for CaF<sub>2</sub>, SrF<sub>2</sub> and GdF<sub>3</sub> which predict properties that agree closely with experimental data and with the results of other polarisable ion models. The method of molecular dynamics has been used to simulate the temperature variation of ionic conductivity in SrF<sub>2</sub> and the results are in excellent agreement with experiment. The melting point T<sub>m</sub> of the simulated material was 1850+or-50 K (cf T<sub>m</sub> (experiment)=1723 K).
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