Cr doping-induced structural phase transition, optical tuning and magnetic enhancement in BiFeO3 thin films

Benlong Guo; Hongmei Deng; Xuezhen Zhai; Wenliang Zhou; Xiankuan Meng; Guoen Weng; Shaoqiang Chen; Pingxiong Yang; Junhao Chu

doi:10.1016/j.matlet.2016.09.094

Cr doping-induced structural phase transition, optical tuning and magnetic enhancement in BiFeO₃ thin films

Benlong Guo, Hongmei Deng, Xuezhen Zhai, Wenliang Zhou, Xiankuan Meng, Guoen Weng, Shaoqiang Chen, Pingxiong Yang^*, Junhao Chu

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

44 Scopus citations

Abstract

BiFe_1−xCr_xO₃ (xBFCO, x=0, 0.03, 0.06 and 0.09) polycrystalline films have been prepared on quartz substrates by a sol–gel technique. X-ray diffraction clearly reveals the crystal structure of xBFCO thin films transforms from rhombohedral to orthorhombic, moreover, inter planar spacing and grain size of xBFCO are reduced slightly. Scanning electron microscopy shows that Cr doping can improve surface morphology and reduces the average grain size of the films. The photoluminescence (PL) spectra of xBFCO thin films at room temperature show a strong emission in the blue region. With increasing x from 0.00 to 0.09, the band gap (E_g) of xBFCO films decreases and can be expressed by E_g=(2.58−0.67x) eV. Compared with BiFeO₃ film, the saturation magnetization of xBFCO (x=0.03, 0.06 and 0.09) films is significantly enhanced, which provides potential applications in information storage.

Original language	English
Pages (from-to)	198-201
Number of pages	4
Journal	Materials Letters
Volume	186
DOIs	https://doi.org/10.1016/j.matlet.2016.09.094
State	Published - 1 Jan 2017

Keywords

BiFeCrO
Magnetic materials
Photoluminescence spectra
Sol–gel preparation
Thin films

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10.1016/j.matlet.2016.09.094

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@article{d368aaf9b5b243738921874731bf205e,

title = "Cr doping-induced structural phase transition, optical tuning and magnetic enhancement in BiFeO3 thin films",

abstract = "BiFe1−xCrxO3 (xBFCO, x=0, 0.03, 0.06 and 0.09) polycrystalline films have been prepared on quartz substrates by a sol–gel technique. X-ray diffraction clearly reveals the crystal structure of xBFCO thin films transforms from rhombohedral to orthorhombic, moreover, inter planar spacing and grain size of xBFCO are reduced slightly. Scanning electron microscopy shows that Cr doping can improve surface morphology and reduces the average grain size of the films. The photoluminescence (PL) spectra of xBFCO thin films at room temperature show a strong emission in the blue region. With increasing x from 0.00 to 0.09, the band gap (Eg) of xBFCO films decreases and can be expressed by Eg=(2.58−0.67x) eV. Compared with BiFeO3 film, the saturation magnetization of xBFCO (x=0.03, 0.06 and 0.09) films is significantly enhanced, which provides potential applications in information storage.",

keywords = "BiFeCrO, Magnetic materials, Photoluminescence spectra, Sol–gel preparation, Thin films",

author = "Benlong Guo and Hongmei Deng and Xuezhen Zhai and Wenliang Zhou and Xiankuan Meng and Guoen Weng and Shaoqiang Chen and Pingxiong Yang and Junhao Chu",

note = "Publisher Copyright: {\textcopyright} 2016 Elsevier B.V.",

year = "2017",

month = jan,

day = "1",

doi = "10.1016/j.matlet.2016.09.094",

language = "英语",

volume = "186",

pages = "198--201",

journal = "Materials Letters",

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TY - JOUR

T1 - Cr doping-induced structural phase transition, optical tuning and magnetic enhancement in BiFeO3 thin films

AU - Guo, Benlong

AU - Deng, Hongmei

AU - Zhai, Xuezhen

AU - Zhou, Wenliang

AU - Meng, Xiankuan

AU - Weng, Guoen

AU - Chen, Shaoqiang

AU - Yang, Pingxiong

AU - Chu, Junhao

PY - 2017/1/1

Y1 - 2017/1/1

N2 - BiFe1−xCrxO3 (xBFCO, x=0, 0.03, 0.06 and 0.09) polycrystalline films have been prepared on quartz substrates by a sol–gel technique. X-ray diffraction clearly reveals the crystal structure of xBFCO thin films transforms from rhombohedral to orthorhombic, moreover, inter planar spacing and grain size of xBFCO are reduced slightly. Scanning electron microscopy shows that Cr doping can improve surface morphology and reduces the average grain size of the films. The photoluminescence (PL) spectra of xBFCO thin films at room temperature show a strong emission in the blue region. With increasing x from 0.00 to 0.09, the band gap (Eg) of xBFCO films decreases and can be expressed by Eg=(2.58−0.67x) eV. Compared with BiFeO3 film, the saturation magnetization of xBFCO (x=0.03, 0.06 and 0.09) films is significantly enhanced, which provides potential applications in information storage.

AB - BiFe1−xCrxO3 (xBFCO, x=0, 0.03, 0.06 and 0.09) polycrystalline films have been prepared on quartz substrates by a sol–gel technique. X-ray diffraction clearly reveals the crystal structure of xBFCO thin films transforms from rhombohedral to orthorhombic, moreover, inter planar spacing and grain size of xBFCO are reduced slightly. Scanning electron microscopy shows that Cr doping can improve surface morphology and reduces the average grain size of the films. The photoluminescence (PL) spectra of xBFCO thin films at room temperature show a strong emission in the blue region. With increasing x from 0.00 to 0.09, the band gap (Eg) of xBFCO films decreases and can be expressed by Eg=(2.58−0.67x) eV. Compared with BiFeO3 film, the saturation magnetization of xBFCO (x=0.03, 0.06 and 0.09) films is significantly enhanced, which provides potential applications in information storage.

KW - BiFeCrO

KW - Magnetic materials

KW - Photoluminescence spectra

KW - Sol–gel preparation

KW - Thin films

UR - https://www.scopus.com/pages/publications/84990855901

U2 - 10.1016/j.matlet.2016.09.094

DO - 10.1016/j.matlet.2016.09.094

M3 - 文章

AN - SCOPUS:84990855901

SN - 0167-577X

VL - 186

SP - 198

EP - 201

JO - Materials Letters

JF - Materials Letters

ER -

Cr doping-induced structural phase transition, optical tuning and magnetic enhancement in BiFeO₃ thin films

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Keywords

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