Structural evolution and phase transition of Sr3Sn2O7 doped with Ca

被引：3

作者：

Sun, Xiaofan ^{[1
]}

Tang, Zheng ^{[1
]}

Yang, Xingming ^{[1
]}

Gao, Zhangran ^{[1
]}

Wu, Yuying ^{[1
]}

Jiang, Junjie ^{[1
]}

Zhang, Zhe ^{[1
]}

Jiao, Shulin ^{[1
]}

Li, Dong ^{[1
]}

Cai, Hong-Ling ^{[1
]}

Wu, X. S. ^{[1
]}

机构：

[1] Nanjing Univ, Collaborat Innovat Ctr Adv Microstruct, Sch Phys, Lab Solid State Microstruct, Nanjing 210093, Peoples R China

来源：

CHEMICAL PHYSICS LETTERS | 2021年 / 766卷

基金：

国家重点研发计划;

关键词：

Ferroelectrics; Crystal structure; Phase transitions; Phonon mode;

D O I：

10.1016/j.cplett.2021.138319

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

The ceramics of Sr3-xCaxSn2O7 (x = 0,0.1,0.2,0.3,0.6,0.8,1) were synthesized by solid-state reaction method. The lattice constants of Sr3-xCaxSn2O7 decrease, and the rotation of oxygen octahedron around c axis increases with the increasing of Ca doping. The phase transition temperature of Sr3-xCaxSn2O7 increases 183.3 K with the increase of Ca doping concentration from x = 0 to x = 0.3. The space group of Sr3Sn2O7 changed from A2(1)am to I4/mmm at 407.9 K. Near the phase transition temperature, the Raman shift of phonon mode A(1)((2)) of Sr3-xCaxSn2O7 changes abruptly, and the phonon mode A(2)((2)) disappears gradually.

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页数：7

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