Bi5Ti3FeO15薄膜的结构和多铁性研究

doi:10.15541/jim20160630

无机材料学报 ›› 2017, Vol. 32 ›› Issue (10): 1018-1022.DOI: 10.15541/jim20160630 CSTR: 32189.14.10.15541/jim20160630

Bi₅Ti₃FeO₁₅薄膜的结构和多铁性研究

黄志登, 赵洪阳, 马志斌, 付秋明, 陶洪, 梵子冉

(武汉工程大学材料科学与工程学院, 湖北省等离子体化学与新材料重点实验室, 武汉 430073)

收稿日期:2016-11-15 修回日期:2016-12-28 出版日期:2017-10-20 网络出版日期:2017-09-21
作者简介:黄志登(1993-), 男, 硕士研究生. E-mail: huangzdreg@126.com
基金资助:
国家自然科学基金(51402327, 91622122);湖北省教育厅科学技术研究项目(2016CFB387)

Structure and Property of Bi₅Ti₃FeO₁₅ Film

HUANG Zhi-Deng, ZHAO Hong-Yang, MA Zhi-Bin, FU Qiu-Ming, TAO Hong, FAN Zi-Ran

(Key Laboratory of Plasma Chemical and Advanced Materials of Hubei Province, Department of Materials Science and Engineering, Wuhan Institute of Technology, Wuhan 430073, China)

Received:2016-11-15 Revised:2016-12-28 Published:2017-10-20 Online:2017-09-21
About author:HUANG Zhi-Deng. E-mail: huangzdreg@126.com
Supported by:
National Natural Science Foundation of China (51402327, 91622122);Science and Technology Research of Hubei Provincial Department of Education (2016CFB387)

摘要/Abstract

摘要：

采用脉冲激光沉积的方法, 在Pt/Ti/SiO₂/Si衬底上生长Bi₅Ti₃FeO₁₅(BTFO15)多铁性薄膜, 并对其结构、磁性、铁电性、铁电畴等进行了研究。通过X射线衍射、扫描电镜以及高角环形暗场像-扫描透射电镜测试, 结果表明, 薄膜具有高结晶度和完美层状晶格结构, 两层Bi原子层紧密堆积, 两层Bi₂O₂之间有三层Bi层和三层Ti(Fe)O₆八面体层, 构成三明治结构; 在室温下的磁滞回线和电滞回线证实了弱铁磁性和铁电性的共存; 采用压电响应力显微镜研究了薄膜的畴结构, 在面内和面外分别施加±3 V和±10 V的电压, 观测到了畴反转。这些研究结果对理解多铁性材料的微观结构和宏观特性的相互调制有重要意义。

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关键词: Bi₅Ti₃FeO₁₅薄膜, 多铁性, 铁电畴

Abstract:

Bi₅Ti₃FeO₁₅(BTFO15) thin films were grown on Pt/Ti/SiO₂/Si substrate by pulsed laser deposition (PLD) method. The structure, magnetic properties, ferroelectric properties, and ferroelectric domains were studied by using X ray diffraction, scanning electron microscopy and scanning TEM high-angle annular dark-field (HAADF STEM). Results showed that the BTFO15 film had high crystallization with perfect layered lattice structure. It stacked like a sandwich which three Bi layers and Ti(Fe)O₆ octahedra were sandwiched by two closely stacked Bi layers. In addtion, room-temperature magnetic hystersis loop and ferroelectric hysteresis loop confirmed that the BTFO15 film had weak ferromagnetism and ferroelectricity. The piezo response force microscope was used to study the domain and domain switching, the in-plane and out-of-plane PFM images were obtained by applying the voltage of ±3 V and ±10 V. These results are important to understand the relationship between microstructure and property of multiferroic materials.

Key words: Bi₅Ti₃FeO₁₅ film, multiferroic, ferroelectric domain

中图分类号:

TQ174

黄志登, 赵洪阳, 马志斌, 付秋明, 陶洪, 梵子冉. Bi₅Ti₃FeO₁₅薄膜的结构和多铁性研究[J]. 无机材料学报, 2017, 32(10): 1018-1022.

HUANG Zhi-Deng, ZHAO Hong-Yang, MA Zhi-Bin, FU Qiu-Ming, TAO Hong, FAN Zi-Ran. Structure and Property of Bi₅Ti₃FeO₁₅ Film[J]. Journal of Inorganic Materials, 2017, 32(10): 1018-1022.

图/表 7

图1 BTFO15薄膜的XRD图谱

Fig. 1 XRD pattern of BTFO15 film

图2 BTFO15薄膜的扫描电镜照片

Fig. 2 SEM image of BTFO15 film

图3 BTFO15薄膜的高角环形暗场像-扫描透射电镜图

Fig. 3 HAADF STEM image of a BTFO15 film

图4 不同温度下测试的BTFO15薄膜的磁滞回线

Fig. 4 Magnetic hysteresis loops of BTFO15 film measured at different temperaturesInset is the enlarge figure of the magnetic hysteresis loops of BTFO15 film measured at 300 K

图5 BTFO15薄膜的PFM图

Fig. 5 PFM images of BTFO15 film(a) Topography; (b) +3 V in-plane polarization; (c) -3 V in-plane polarization; (d) Topography; (e) +10V out-of-plane polarization; (f) -10 V out-of-plane polarization

图6 室温下, 频率为60 Hz条件下测试的BTFO15的电滞回线

Fig. 6 Ferroelectric hysteresis loops of BTFO15 film measured at room temperature and 60 Hz

图7 BTFO15薄膜的介电常数、介电损耗与频率的关系曲线

Fig. 7 Curves of the dielectric constant and dielectric loss versus frequency for BTFO15 film

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Bi₅Ti₃FeO₁₅薄膜的结构和多铁性研究

Structure and Property of Bi₅Ti₃FeO₁₅ Film

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