Band gap engineering and magnetic switching in a novel perovskite (1−x)KNbO3−xBaNb1/2Fe1/2O3

Lu Yu; Hongmei Deng; Wenliang Zhou; Pingxiong Yang; Junhao Chu

doi:10.1016/j.matlet.2017.05.077

Band gap engineering and magnetic switching in a novel perovskite (1−x)KNbO₃₋_xBaNb_1/2Fe_1/2O₃

Lu Yu
, Hongmei Deng
, Wenliang Zhou
, Pingxiong Yang^*
, Junhao Chu

^*Corresponding author for this work

School of Physics and Electronic Science

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

15 Scopus citations

Abstract

The phase transition, microstructure, optical and magnetic properties of a novel material (1−x)KNbO₃₋_xBaNb_1/2Fe_1/2O₃ (xKBNFO) have been investigated. X-ray diffraction and Raman scattering spectra analyses suggest that all the samples are polycrystalline perovskite structure with an obvious phase transition. Optical absorption spectra indicate that BaNb_1/2Fe_1/2O₃ (BNFO) doping has an effect on the energy band structure. The KBNFO ceramics exhibit the band gap (E_g) in the range of 1.72–2.48 eV, much smaller than the 3.25 eV E_g of KNbO₃ material. Furthermore, the KBNFO materials present room-temperature ferromagnetism, and the magnetism can be controlled by the BNFO doping content. These results are helpful in the deeper understanding of phase transition, band gap tunability, and magnetism variations in perovskite and show the potential roles in perovskite solar cells and multiferroic applications.

Original language	English
Pages (from-to)	39-43
Number of pages	5
Journal	Materials Letters
Volume	202
DOIs	https://doi.org/10.1016/j.matlet.2017.05.077
State	Published - 1 Sep 2017

Keywords

Band-gap engineering
Ceramics
Lead-free ferroelectric
Magnetic properties
Phase transformation

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@article{44884fc60bad481ebedf5f0f15db84e9,

title = "Band gap engineering and magnetic switching in a novel perovskite (1−x)KNbO3−xBaNb1/2Fe1/2O3",

abstract = "The phase transition, microstructure, optical and magnetic properties of a novel material (1−x)KNbO3−xBaNb1/2Fe1/2O3 (xKBNFO) have been investigated. X-ray diffraction and Raman scattering spectra analyses suggest that all the samples are polycrystalline perovskite structure with an obvious phase transition. Optical absorption spectra indicate that BaNb1/2Fe1/2O3 (BNFO) doping has an effect on the energy band structure. The KBNFO ceramics exhibit the band gap (Eg) in the range of 1.72–2.48 eV, much smaller than the 3.25 eV Eg of KNbO3 material. Furthermore, the KBNFO materials present room-temperature ferromagnetism, and the magnetism can be controlled by the BNFO doping content. These results are helpful in the deeper understanding of phase transition, band gap tunability, and magnetism variations in perovskite and show the potential roles in perovskite solar cells and multiferroic applications.",

keywords = "Band-gap engineering, Ceramics, Lead-free ferroelectric, Magnetic properties, Phase transformation",

author = "Lu Yu and Hongmei Deng and Wenliang Zhou and Pingxiong Yang and Junhao Chu",

note = "Publisher Copyright: {\textcopyright} 2017 Elsevier B.V.",

year = "2017",

month = sep,

day = "1",

doi = "10.1016/j.matlet.2017.05.077",

language = "英语",

volume = "202",

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T1 - Band gap engineering and magnetic switching in a novel perovskite (1−x)KNbO3−xBaNb1/2Fe1/2O3

AU - Yu, Lu

AU - Deng, Hongmei

AU - Zhou, Wenliang

AU - Yang, Pingxiong

AU - Chu, Junhao

PY - 2017/9/1

Y1 - 2017/9/1

N2 - The phase transition, microstructure, optical and magnetic properties of a novel material (1−x)KNbO3−xBaNb1/2Fe1/2O3 (xKBNFO) have been investigated. X-ray diffraction and Raman scattering spectra analyses suggest that all the samples are polycrystalline perovskite structure with an obvious phase transition. Optical absorption spectra indicate that BaNb1/2Fe1/2O3 (BNFO) doping has an effect on the energy band structure. The KBNFO ceramics exhibit the band gap (Eg) in the range of 1.72–2.48 eV, much smaller than the 3.25 eV Eg of KNbO3 material. Furthermore, the KBNFO materials present room-temperature ferromagnetism, and the magnetism can be controlled by the BNFO doping content. These results are helpful in the deeper understanding of phase transition, band gap tunability, and magnetism variations in perovskite and show the potential roles in perovskite solar cells and multiferroic applications.

AB - The phase transition, microstructure, optical and magnetic properties of a novel material (1−x)KNbO3−xBaNb1/2Fe1/2O3 (xKBNFO) have been investigated. X-ray diffraction and Raman scattering spectra analyses suggest that all the samples are polycrystalline perovskite structure with an obvious phase transition. Optical absorption spectra indicate that BaNb1/2Fe1/2O3 (BNFO) doping has an effect on the energy band structure. The KBNFO ceramics exhibit the band gap (Eg) in the range of 1.72–2.48 eV, much smaller than the 3.25 eV Eg of KNbO3 material. Furthermore, the KBNFO materials present room-temperature ferromagnetism, and the magnetism can be controlled by the BNFO doping content. These results are helpful in the deeper understanding of phase transition, band gap tunability, and magnetism variations in perovskite and show the potential roles in perovskite solar cells and multiferroic applications.

KW - Band-gap engineering

KW - Ceramics

KW - Lead-free ferroelectric

KW - Magnetic properties

KW - Phase transformation

UR - https://www.scopus.com/pages/publications/85019837449

U2 - 10.1016/j.matlet.2017.05.077

DO - 10.1016/j.matlet.2017.05.077

M3 - 文章

AN - SCOPUS:85019837449

SN - 0167-577X

VL - 202

SP - 39

EP - 43

JO - Materials Letters

JF - Materials Letters

ER -

Band gap engineering and magnetic switching in a novel perovskite (1−x)KNbO₃₋_xBaNb_1/2Fe_1/2O₃

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Keywords

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