Enhancement in dielectric and optical properties of La1-xCexFeO3 nanoparticles

被引：13
|
作者：
Arman, M. M. [1 ]
El-Dek, S. I. [2 ]
机构：
[1] Cairo Univ, Fac Sci, Dept Phys, Mat Sci Lab 1, Giza, Egypt
[2] Beni Suef Univ, Fac PSAS, Mat Sci & Nanotechnol Dept, Bani Suwayf, Egypt
来源：
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T | 2019年 / 8卷 / 06期
关键词：
Orthoferrite; LaFeO3; Dielectric; Optical properties; Perovskite; Nanoparticles; ELECTRICAL-PROPERTIES; PEROVSKITE OXIDES; LANTHANUM FERRITE; CO-SUBSTITUTION; SOL-GEL; LAFEO3; NANOFIBERS;
D O I：
10.1016/j.jmrt.2019.09.006
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
La1-xCexFeO3; 0 <= x <= 0.15 nanoparticles were prepared in single phase using flash combustion technique. The crystalline structure and morphology of the investigated samples were researched through XRD and HRTEM. As a result, the dielectric constant of LaFeO3 was enhanced by Ce3+ ion substitution due to some the Ce3+ ions changes its valence to Ge4+ ions. The conduction mechanism in La1-xCexFeO3 samples is the small polaron (SP) tunneling. The type of optical transition is direct allowed transition and the band gap values are in the range of (2.8-1.89 eV). 8/ values of La0.90Ce0.10FeO3 decreases by increasing the external applied pressure at different frequencies. (C) 2019 The Authors. Published by Elsevier B.V.
引用
收藏
页码：5396 / 5404
页数：9
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