6533b834fe1ef96bd129de93
RESEARCH PRODUCT
Local structure and lattice dynamics of cubic Y2O3: an x-ray absorption spectroscopy study
Alexei KuzminKarlis Lazdinssubject
Molecular dynamicsX-ray absorption spectroscopychemistryOctahedronAbsorption spectroscopyDistortionAnharmonicityThermalchemistry.chemical_elementPhysical chemistryYttriumMolecular physicsdescription
Classical molecular dynamics was used to interpret the temperature dependent (300-1273 K) Y K-edge x-ray absorption spectra of cubic c-Y2O3 and to validate two force-field models. It was shown that both models reproduce well thermal disorder effect, however are less accurate in description of static octahedra distortion around yttrium atoms. The temperature dependencies of mean-square displacements and mean-square relative displacements were obtained from molecular dynamics simulations for the first two shells of yttrium. The importance of anharmonic effects was demonstrated by comparison of molecular dynamics and lattice dynamics results.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2015-03-09 | IOP Conference Series: Materials Science and Engineering |