期刊
ADVANCED FUNCTIONAL MATERIALS
卷 23, 期 2, 页码 185-190出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/adfm.201201564
关键词
ferroics; ceramics; characterization tools; dielectrics; structure-property relationships
类别
资金
- Science City Research Alliance
- HEFCE Strategic Development Fund
- Institute of Advanced Study (IAS) Warwick
- Region Rhone-Alpes (CMIRA grant)
ABO3 perovskite-type solid solutions display a large variety of structural and physical properties, which can be tuned by chemical composition or external parameters such as temperature, pressure, strain, electric, or magnetic fields. Some solid solutions show remarkably enhanced physical properties including colossal magnetoresistance or giant piezoelectricity. It has been recognized that structural distortions, competing on the local level, are key to understanding and tuning these remarkable properties, yet, it remains a challenge to experimentally observe such local structural details. Here, from neutron pair-distribution analysis, a temperature-dependent 3D atomic-level model of the lead-free piezoelectric perovskite Na0.5Bi0.5TiO3 (NBT) is reported. The statistical analysis of this model shows how local distortions compete, how this competition develops with temperature, and, in particular, how different polar displacements of Bi3+ cations coexist as a bifurcated polarization, highlighting the interest of Bi-based materials in the search for new lead-free piezoelectrics.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据