Computer modelling and brillouin scattering studies of high temperature disorder in CdF2
作者:
T.T. Netshisaulu,
P.E. Ngoepe,
J.D. Comins,
C.R. A. Catlow,
期刊:
Radiation Effects and Defects in Solids
(Taylor Available online 1995)
卷期:
Volume 134,
issue 1-4
页码: 111-115
ISSN:1042-0150
年代: 1995
DOI:10.1080/10420159508227194
出版商: Taylor & Francis Group
关键词: CdF2;elastic constants;lattice simulation;interionic potentials;lattice parameter;Brillouin scattering
数据来源: Taylor
摘要:
The reliability of the lattice simulations depends on the quality of the potentials used. Hence, the interionic potentials of CdF2were derived and used in the calculations of the crystal bulk data. The temperature dependences of elastic constants is investigated. Elastic properties are predicted. The complementary studies using Brillouin scattering methods, show that the disorder at the transition temperature (Tc≊ 900 K) results in an abrupt decrease in the elastic constant C11. Both methods show that the elastic constants linearly decrease with increasing temperature within the low temperature region. Similar trends have been observed in other fluorites. This shows that our interionic potentials reproduce the behaviour of CdF2reasonably well.
点击下载:
PDF (221KB)
返 回