Inelastic neutron scattering and lattice dynamics of NaNbO3 and Sr0.70Ca0.30TiO3

Pramana

D Pandey¹  S L Chaplot²  N Choudhury²  S K Mishra1²  R Mittal1² 

[1] School of Materials Science and Technology, Institute of Technology, Banaras Hindu University, Varanasi 210 005, India$$;Solid State Physics Division, Bhabha Atomic Research Centre, Mumbai 400 085, India$$

关键词: Lattice dynamics;    inelastic neutron scattering;    ferroelectrics;    antiferroelectric;    NaNbO3;    SrTiO3.;   

DOI  :  

学科分类：物理（综合）

来源: Indian Academy of Sciences

【 摘 要 】

NaNbO3 and (Sr,Ca)TiO3 exhibit an unusual complex sequence of temperature- and pressure-driven structural phase transitions. We have carried out lattice dynamical studies to understand the phonon modes responsible for these phase transitions. Inelastic neutron scattering measurements using powder samples were carried out at the Dhruva reactor, which provide the phonon density of states. Lattice dynamical models have been developed for SrTiO3 and CaTiO3 which have been fruitfully employed to study the phonon spectra and vibrational properties of the solid solution (Sr,Ca)TiO3.

【 授权许可】

Unknown