压电
兴奋剂
铁电性
材料科学
掺杂剂
单晶
扫描透射电子显微镜
Crystal(编程语言)
分析化学(期刊)
结晶学
透射电子显微镜
矿物学
凝聚态物理
纳米技术
光电子学
物理
化学
电介质
复合材料
计算机科学
色谱法
程序设计语言
作者
Fēi Li,Matthew J. Cabral,Bin Xu,Zhenxiang Cheng,Elizabeth C. Dickey,James M. LeBeau,Jianli Wang,Jun Luo,Samuel Taylor,Wesley S. Hackenberger,L. Bellaïche,Zhuo Xu,Lei Chen,Thomas R. Shrout,Shujun Zhang
出处
期刊:Science
[American Association for the Advancement of Science (AAAS)]
日期:2019-04-19
卷期号:364 (6437): 264-268
被引量:486
标识
DOI:10.1126/science.aaw2781
摘要
High-performance piezoelectrics benefit transducers and sensors in a variety of electromechanical applications. The materials with the highest piezoelectric charge coefficients (d33) are relaxor-PbTiO3 crystals, which were discovered two decades ago. We successfully grew Sm-doped Pb(Mg1/3Nb2/3)O3-PbTiO3 (Sm-PMN-PT) single crystals with even higher d33 values ranging from 3400 to 4100 picocoulombs per newton, with variation below 20% over the as-grown crystal boule, exhibiting good property uniformity. We characterized the Sm-PMN-PT on the atomic scale with scanning transmission electron microscopy and made first-principles calculations to determine that the giant piezoelectric properties arise from the enhanced local structural heterogeneity introduced by Sm3+ dopants. Rare-earth doping is thus identified as a general strategy for introducing local structural heterogeneity in order to enhance the piezoelectricity of relaxor ferroelectric crystals.
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