Defect Control for Polarization Switching in BiFeO3 Single Crystals

被引：23

作者：

Chishima, Yuji ^{[1
]}

Noguchi, Yuji ^{[1
]}

Kitanaka, Yuuki ^{[1
]}

Miyayama, Masaru ^{[1
]}

机构：

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

来源：

IEEE TRANSACTIONS ON ULTRASONICS FERROELECTRICS AND FREQUENCY CONTROL | 2010年 / 57卷 / 10期

关键词：

FERROELECTRIC POLARIZATION; CERAMICS; MN;

D O I：

10.1109/TUFFC.2010.1683

中图分类号：

O42 [声学];

学科分类号：

070206 ; 082403 ;

摘要：

BiFeO3(BFO) single crystals were grown and the effects of Zn and Mn co-doping on the polarization and leakage current properties were investigated at 25 degrees C for establishing materials design based on defect chemistry. Although Zn doping or Mn doping led to a deterioration in the properties, Zn-Mn co-doping led to a large remanent polarization (36 mu C/cm(2)), a low coercive field (19 kV/cm), and a relatively low leakage current density (similar to 10(-8) A/cm(2)). It is proposed that defect dipoles composed of Zn2+ and Mn4+ act as effective nucleation sites for ferroelectric domains during polarization switching in BFO crystals.

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页码：2233 / 2236

页数：4

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