Uncovering ferroelectric polarization in tetragonal (Bi1/2K1/2) TiO3-(Bi1/2Na1/2)TiO3 single crystals

被引：6
|
作者：
Kitanaka, Yuuki [1 ]
Noguchi, Yuji [1 ]
Miyayama, Masaru [1 ]
机构：
[1] Univ Tokyo, Sch Engn, Dept Appl Chem, Bunkyo Ku, 7-3-1 Hongo, Tokyo 1138656, Japan
来源：
SCIENTIFIC REPORTS | 2019年 / 9卷 / 1期
基金：
日本学术振兴会;
关键词：
PIEZOELECTRIC PROPERTIES; OXYGEN; SUPERCONDUCTIVITY; TEMPERATURE; CONSTANT; SYSTEM; STRAIN; GROWTH;
D O I：
10.1038/s41598-019-55576-y
中图分类号：
O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];
学科分类号：
07 ; 0710 ; 09 ;
摘要：
We report the robust ferroelectric properties of (1 - x)(Bi1/2Na1/2)TiO3-x((Bi1/2K1/2)TiO3(x= 33%) single crystals grown by a top-seeded solution growth process under a high oxygen-pressure (0.9 MPa) atmosphere. The sample exhibit a large remanent polarization of 48 mu C/cm(2) and a sizeable piezoelectric strain constant of 460 pm/V. Neutron powder diffraction structural analysis combined with first-principles calculations reveals that the large ferroelectric polarization comparable to PbTiO3 stems from the hybridization between Bi-6p and O-2p orbitals at a moderately negative chemical pressure.
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页数：8
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