Effect of Zn doping on structural, magnetic and dielectric properties of LaFeO3 synthesized through sol-gel auto-combustion process

被引:109
作者
Bhat, Irshad [1 ]
Husain, Shahid [1 ]
Khan, Wasi [2 ]
Patil, S. I. [3 ]
机构
[1] Aligarh Muslim Univ, Dept Phys, Aligarh 202002, Uttar Pradesh, India
[2] Aligarh Muslim Univ, Dept Appl Phys, ZH Coll Engn & Technol, Aligarh 202002, Uttar Pradesh, India
[3] Univ Pune, Dept Phys, Pune 411007, Maharashtra, India
关键词
Oxides; Sol-gel chemistry; X-ray diffraction; Dielectric properties; CATALYTIC-PROPERTIES; TRANSPORT PROPERTIES; COPPER FERRITES; PEROVSKITE; OXIDES; TEMPERATURE; CONDUCTIVITY; POWDERS; ND; MN;
D O I
10.1016/j.materresbull.2013.07.028
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
We have studied the structural and dielectric properties of nano-crystalline LaFe1-xZnxO3 (0 <= x <= 0.3) pervoskite samples synthesized through sol-gel auto-combustion technique. X-ray diffraction and FTIR spectroscopy are used to confirm the single phase characteristics. Microstructural features are investigated using scanning electron microscope and compositional analysis is performed through energy dispersive spectroscopy. The average grain sizes, calculated from the Scherrer formula, lie in the range below 30 nm. The hysteresis (M-H) curves display a weak magnetic order and a shift in the hysteresis loops. Dielectric response has been discussed, in the framework of "universal dielectric response" model. The value of dielectric constant (epsilon') increases drastically on Zn doping. The dielectric loss factor (epsilon '') shows Debye like dipolar relaxation behavior. The observed peaks in loss factor (epsilon '') are attributed to the fact that a strong correlation between the conduction mechanism and the dielectric behavior exists in ferrites. (C) 2013 Elsevier Ltd. All rights reserved.
引用
收藏
页码:4506 / 4512
页数:7
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