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Acoustic anomalies and relaxation dynamics of relaxor ferroelectric Na1/2Bi1/2TiO3 single crystals studied by using Brillouin spectroscopy
Oh, SH; Ko, JH; Li, XB; Luo, HS
2020-07-05
Source PublicationCURRENT APPLIED PHYSICS
ISSN1567-1739
Issue7Pages:835
SubtypeArticle
AbstractAcoustic anomalies of relaxor ferroelectric Na1/2Bi1/2TiO3 single crystals were investigated over a wide temperature range from -196 degrees C to 900 degrees C by using Brillouin spectroscopy. The longitudinal sound velocity, the acoustic absorption coefficient and the elastic constant C-11 were determined for the acoustic phonon mode propagating in the [100] direction. Two acoustic anomalies, weaker ones at the cubic-tetragonal phase transition temperature of similar to 540 degrees C and more pronounced ones at temperatures near 315 degrees C near the dielectric maximum temperature, were investigated and discussed in relation with the relevant order parameters coupled to the acoustic waves. The relaxation dynamics in the cubic phase were studied based on the flattening of the mode frequency and the half width, which was observed for the first time, and a modified Arrhenius law.
DOI10.1016/j.cap.2020.04.002
WOS KeywordPHASE-TRANSITIONS ; LIGHT-SCATTERING ; BEHAVIOR ; RAMAN
Language英语
WOS Research AreaMaterials Science ; Physics
PublisherELSEVIER
Citation statistics
Document Type期刊论文
Identifierhttp://ir.sic.ac.cn/handle/331005/27919
Collection中国科学院上海硅酸盐研究所
Recommended Citation
GB/T 7714
Oh, SH,Ko, JH,Li, XB,et al. Acoustic anomalies and relaxation dynamics of relaxor ferroelectric Na1/2Bi1/2TiO3 single crystals studied by using Brillouin spectroscopy[J]. CURRENT APPLIED PHYSICS,2020(7):835.
APA Oh, SH,Ko, JH,Li, XB,&Luo, HS.(2020).Acoustic anomalies and relaxation dynamics of relaxor ferroelectric Na1/2Bi1/2TiO3 single crystals studied by using Brillouin spectroscopy.CURRENT APPLIED PHYSICS(7),835.
MLA Oh, SH,et al."Acoustic anomalies and relaxation dynamics of relaxor ferroelectric Na1/2Bi1/2TiO3 single crystals studied by using Brillouin spectroscopy".CURRENT APPLIED PHYSICS .7(2020):835.
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