Effect of Mn doping on the acoustic and vibrational behaviors of lead-free piezoelectric (Na1/2Bi1/2)TiO3-xBaTiO3 single crystal

被引：3

作者：

Oh, Soo Han ^{[1
]}

Lee, Byoung Wan ^{[1
]}

Jang, Moongyu ^{[1
]}

Ko, Jae-Hyeon ^{[1
]}

Li, Xiaobing ^{[2
]}

Luo, Haosu ^{[2
]}

机构：

[1] Hallym Univ, Nano Convergence Technol Ctr, Sch Nano Convergence Technol, Chunchon 24252, Gangwon Do, South Korea

[2] Chinese Acad Sci, Shanghai Inst Ceram, Shanghai 201800, Peoples R China

来源：

CURRENT APPLIED PHYSICS | 2019年 / 19卷 / 11期

基金：

新加坡国家研究基金会;

关键词：

NBT-BT; Lead-free; Relaxor; Mn doping; Light scattering; BRILLOUIN-SCATTERING; RELAXOR FERROELECTRICS; ELASTIC PROPERTIES;

D O I：

10.1016/j.cap.2019.08.001

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The acoustic and vibrational properties of Mn-doped (Na1/2Bi1/2)TiO3-xBaTiO(3) with x=0.05 were investigated by using Brillouin and Raman spectroscopies and compared with those of undoped crystals. The mode frequency and the half width of the Brillouin doublet of the longitudinal acoustic mode showed more drastic changes near the dielectric maximum temperature compared to the broad and diffused changes of the undoped crystals, which indicates that Mn-doping induces polar domains larger than the typical polar nanoregions formed in undoped counterpart. The acoustic anomalies were most pronounced along the < 100> direction suggesting that the polarization fluctuations are anisotropic and largest along this direction. Temperature dependence of Raman spectra showed that there are two characteristics temperatures where mode splitting occurs due to local symmetry changes. The high-temperature anomaly was associated with the changes in the acoustic properties, while the low-temperature mode splitting was related to the dielectric anomaly near depolarization temperature.

引用

页码：1195 / 1203

页数：9

共 52 条

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