Raman spectroscopic studies on the ferroelectric soft mode in SnxSr1-xTiO3
Raman spectroscopic studies on the ferroelectric soft mode in SnxSr1-xTiO3
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SnxSr1-xTiO3 铁电软模的拉曼光谱研究
DOI：
10.1080/00150193.2018.1430427
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发表时间：
2018
期刊：
影响因子：
0.8
通讯作者：
and Kohji Abe
中科院分区：
文献类型：
--
作者：
Tsuguhito Nakano;Yu Mikami;Minoru Kobayashi;Yukihiro Kogai;and Kohji Abe
获得了新型铁电陶瓷SnxSr1-xTiO3（x= 0.1, 0.05和0.02）的拉曼光谱，以阐明其铁电相变机理。铁电相的两种横向光学模式随着铁电转变温度的升高而软化。将snxsr1 - xtio3的光谱与pbxsr1 - xtio3的光谱进行比较，有助于在铁电相不对称假设下对观测模式的分配。然而，观察到几个违反拉曼选择规则的峰，表明即使在准电相中也有极区出现和生长。
The Raman spectra of novel ferroelectric ceramics SnxSr1-xTiO3(x= 0.1, 0.05 and 0.02) were obtained to clarify the mechanism of their ferroelectric phase transitions. Two transverse-optic modes in the ferroelectric phase showed softening toward the ferroelectric transition temperature. A comparison of the spectra obtained for SnxSr1-xTiO3with the spectrum of PbxSr1-xTiO3facilitated the assignment of the observed modes under the assumption of the ferroelectric phase insymmetry. However, several peaks violating the Raman selection rules were observed, suggesting the emergence and growth of polar regions even in the paraelectric phase.