Polarization Rotation and Monoclinic Distortion in Ferroelectric (Bi0.5Na0.5)TiO3-BaTiO3 Single Crystals under Electric Fields

被引：22

作者：

Ogino, Motohiro ^{[1
]}

Noguchi, Yuji ^{[1
]}

Kitanaka, Yuuki ^{[1
]}

Miyayama, Masaru ^{[1
]}

Moriyoshi, Chikako ^{[2
]}

Kuroiwa, Yoshihiro ^{[2
]}

机构：

[1] Univ Tokyo, Adv Sci & Technol Res Ctr, Meguro Ku, Tokyo 1538904, Japan

[2] Hiroshima Univ, Grad Sch Sci, Higashihiroshima, Hiroshima 7398526, Japan

来源：

CRYSTALS | 2014年 / 4卷 / 03期

基金：

日本学术振兴会;

关键词：

ferroelectric crystals; bismuth sodium titanate; BNT; spontaneous polarization; X-ray diffraction; synchrotron radiation X-ray diffraction; DFT; monoclinic; rhombohedral; MORPHOTROPIC PHASE-BOUNDARY; PIEZOELECTRIC PROPERTIES; COMPLEX PEROVSKITES; HIGH-PRESSURE; X-RAY; NA0.5BI0.5TIO3; DIFFRACTION; TRANSITIONS; SYMMETRY; SYSTEM;

D O I：

10.3390/cryst4030273

中图分类号：

O7 [晶体学];

学科分类号：

0702 ; 070205 ; 0703 ; 080501 ;

摘要：

The features of the crystal structures and spontaneous polarization (P-s) under an electric field (E) have been reviewed for (1 - x)(Bi0.5Na0.5) TiO3-xBaTiO(3) (BNT-BT). In-situ measurements of high-resolution synchrotron radiation X-ray diffraction (SR-XRD) under electric fields show that single crystals with x = 0 (BNT) and 5% have a monoclinic distortion in space group Cc at 25 degrees C. The SR-XRD study combined with density functional theory (DFT) calculations demonstrates that BNT-5% BT exhibits a rotation of Ps in the monoclinic a-c plane by 2 degrees under an E of 70 kV/cm along the <001> pseudo-cubic direction, which is much larger than BNT.

引用

页码：273 / 295

页数：23

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