Effects of annealing temperature on the structures, ferroelectric and magnetic properties of Aurivillius Bi5Ti3FeO15 polycrystalline films

被引：30

作者：

Bai, W. ^{[1
,2
]}

Zhu, J. Y. ^{[1
]}

Wang, J. L. ^{[2
]}

Lin, T. ^{[2
]}

Yang, J. ^{[1
]}

Meng, X. J. ^{[2
]}

Tang, X. D. ^{[1
]}

Zhu, Z. Q. ^{[1
]}

Chu, J. H. ^{[1
,2
]}

机构：

[1] E China Normal Univ, Minist Educ, Key Lab Polar Mat & Devices, Shanghai 200241, Peoples R China

[2] Chinese Acad Sci, Shanghai Inst Tech Phys, Natl Lab Infrared Phys, Shanghai 200083, Peoples R China

来源：

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS | 2012年 / 324卷 / 14期

基金：

中国博士后科学基金; 上海市自然科学基金;

关键词：

Aurivillius compound; Multiferroic property; Annealing temperature; THIN-FILMS; BI5FETI3O15;

D O I：

10.1016/j.jmmm.2012.02.113

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The effects of annealing temperature on the structures, ferroelectric and magnetic properties of Aurivillius layer-structured Bi5Ti3FeO15 (BTF) films were investigated. It was found that an annealing temperature above 625 degrees C can lead to the appearance of Bi4Ti3O12 (BiT) secondary phase on Pt substrates. The reduction of the grain sizes was simultaneously confirmed by X-ray diffraction and atomic force microscopy with the introduction of the BiT phase. Moreover, the remanent polarization and coercive field of the BTF films were dramatically enhanced with the introduction of the BiT phase. Improved ferromagnetism for the BTF films was demonstrated upon increasing annealing temperature. Our data indicated that the ferroelectricity strongly correlated with the growth orientation of the BTF films. Finally, the possible factors for the obvious increase of the remanent polarization and coercive field, and the possible reasons for the enhanced ferromagnetic properties were discussed with increasing annealing temperature. (C) 2012 Elsevier B.V. All rights reserved.

引用

页码：2265 / 2270

页数：6

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