Structure and Electrical Properties of Na0.5Bi0.5TiO3 Epitaxial Films with (110) Orientation

被引：9

作者：

Song, Jianmin ^{[1
,2
]}

Gao, Jie ^{[2
]}

Zhang, Suwei ^{[3
]}

Luo, Laihui ^{[4
]}

Dai, Xiuhong ^{[1
]}

Zhao, Lei ^{[1
]}

Liu, Baoting ^{[1
]}

机构：

[1] Hebei Univ, Coll Phys Sci & Technol, Hebei Key Lab Opt Elect Informat & Mat, Baoding 071002, Peoples R China

[2] Agr Univ Hebei, Coll Sci, Baoding 071001, Peoples R China

[3] Natl Inst Metrol, Ctr Adv Measurement Sci, Beijing 100029, Peoples R China

[4] Ningbo Univ, Coll Sci, Ningbo 315211, Zhejiang, Peoples R China

来源：

CRYSTALS | 2019年 / 9卷 / 11期

基金：

中国国家自然科学基金;

关键词：

NBT epitaxial film; ferroelectric properties; ultraviolet light; THIN-FILMS; ELECTRORESISTANCE;

D O I：

10.3390/cryst9110558

中图分类号：

O7 [晶体学];

学科分类号：

0702 ; 070205 ; 0703 ; 080501 ;

摘要：

Pt/Na0.5Bi0.5TiO3/La0.5Sr0.5CoO3 (Pt/NBT/LSCO) ferroelectric capacitors were fabricated on (110) SrTiO3 substrate. Both NBT and LSCO films were epitaxially grown on the (110) SrTiO3 substrate. It was found that the leakage current density of the Pt/NBT/LSCO capacitor is favorable to ohmic conduction behavior when the applied electric fields are lower than 60 kV/cm, and bulk-limited space charge-limited conduction takes place when the applied electric fields are higher than 60 kV/cm. The Pt/NBT/LSCO capacitor possesses good fatigue resistance and retention, as well as ferroelectric properties with P-r = 35 mu C/cm(2). The ferroelectric properties of the Pt/NBT/LSCO capacitor can be modulated by ultraviolet light. The effective polarization, Delta P, was reduced and the maximum polarization P-max was increased for the Pt/NBT/LSCO capacitor when under ultraviolet light, which can be attributed to the increased leakage current density and non-reversible polarization P-boolean AND caused by the photo-generated carriers.

引用

页数：8

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