Band-gap Tuning and Magnetic Properties of Heterovalent ions (Ba, Sr and Ca) Substituted BiFeO3 Nanoparticles

被引：1
|
作者：
Chauhan, Sunil [1 ]
Kumar, Manoj [1 ]
Katyal, S. C. [1 ]
机构：
[1] Jaypee Inst Informat Technol, Dept Phys & Mat Sci & Engn, Noida 201307, India
来源：
DAE SOLID STATE PHYSICS SYMPOSIUM 2015 | 2016年 / 1731卷
关键词：
Multiferroics; Raman spectroscopy; Optical properties; nanocrystalline magnetic materials;
D O I：
10.1063/1.4948135
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
A Comparative study of heterovalent Ba, Sr and Ca ions substitution on the structural, vibrational, optical and magnetic properties of BiFeO3 nanoparticles was carried out. The distorted rhombohedral structure was confirmed from both X-ray diffraction and Raman spectroscopy techniques in pure BiFeO3 and Bi(0.85)A(0.15)FeO(3) ( A=Ba, Sr and Ca) samples. UV-Visible spectroscopy results show that the band-gap of BiFeO3 nanoparticles can be tuned by heterovalent ions substitution from 2.12 eV for BiFeO3 to 2.10, 2.06 and 2.03 eV for Ca, Sr and Ba substituted BiFeO3 nanoparticles respectively. The magnetic measurements indicate enhancement in magnetization for heterovalent A(2+) substituted BiFeO3 samples and the magnetization increases with increase of ionic radius of the substituted ions.
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