Two-Phase Coexistence and Multiferroic Properties of Cr-Doped BiFeO3 Thin Films

被引：22

作者：

Yin, Lixiong ^{[1
]}

Liu, Wenlong ^{[1
]}

Tan, Guoqiang ^{[1
]}

Ren, Huijun ^{[1
]}

机构：

[1] Shaanxi Univ Sci & Technol, Sch Mat Sci & Engn, Xian 710021, Peoples R China

来源：

JOURNAL OF SUPERCONDUCTIVITY AND NOVEL MAGNETISM | 2014年 / 27卷 / 12期

基金：

中国国家自然科学基金;

关键词：

BiFeO3; Sol-Gel; Structure; Ferroelectricity; Ferromagnetism; FERROELECTRIC PROPERTIES; ELECTRICAL-PROPERTIES;

D O I：

10.1007/s10948-014-2674-1

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Pure BiFeO3 (BFO) and Cr-doped BiFe0.97 Cr0.03O3 (BFCO) thin films were successfully prepared on F-doped SnO2 conductive film (FTO)/glass (SnO2: F) substrates by a sol-gel method. The effect of Cr doping on the structure, ferroelectric, and ferromagnetic properties of the BFO and BFCO thin films have been investigated. X-ray diffraction, Rietveld refined X-ray diffraction (XRD) patterns, and Raman spectroscopy results clearly reveal that the BFCO thin film is characterized by the coexistence of two phases (trigonal and tetragonal). Moreover, the various leakage mechanisms of both thin films have also been studied. The improved ferroelectricity with remnant polarization (Pr) of about 2Pr = 68.68 mu C/cm(2) under an applied electric field of 1,181.8 kV/cm and enhanced ferromagnetism with saturation magnetization (Ms) of Ms = 0.93 emu/cm(3) have been observed in the BFCO thin film. The improved electrical properties of the BFCO thin film are ascribed to the coexistence of trigonal and tetragonal phase and high valence of Cr6+, and the Fe-O 6 octahedron distortion is enhanced due to the overlap and hybridization of Fe3d/Cr3d and O-2p orbits by Cr doping.

引用

页码：2765 / 2772

页数：8

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