Brillouin light scattering and second harmonic generation in barium strontium niobate films

被引：0
|
作者：
Pugachev, A. M. [1 ]
Sokolov, A. A. [1 ]
机构：
[1] Russian Acad Sci, Inst Automat & Electrometry, Novosibirsk, Russia
来源：
FERROELECTRICS | 2024年 / 618卷 / 06期
基金：
俄罗斯科学基金会;
关键词：
Brillouin light scattering; Ferroelectric thin films; Ferroelectrics; Second harmonic generation; POLARIZATION; CRYSTALS; DEPENDENCE; ANOMALIES; STRAIN;
D O I：
10.1080/00150193.2024.2305583
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Temperature dependences of Brillouin light scattering spectra from Ba0.5Sr0.5 Nb2O6 (SBN 50) film were obtained. The deviations of the Brillouin shift dependence from linear near ferroelectric phase transition are due to electric fields in the local regions with symmetry breaking. A maximum of Brillouin line width is more than twice of the corresponding width in a bulk crystal of the same composition. This broadening is attributed to the confinement of the acoustic phonons. Optical second harmonic generation measurements (SHG) showed that the transition from the polar to the nonpolar phase occurred at a temperature characteristic of SBN-50.
引用
收藏
页码：1431 / 1437
页数：7
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