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Structural, Magnetic, and Electrical Properties of Al3+ Substituted CuZn-ferrites
S. M. Ramay,Saadat A. Siddiqi,S. Atiq*,M. S. Awan,S. Riaz
Author NameAffiliationE-mail
S. M. Ramay Center of Excellence in Solid State Physics, University of the Punjab, Lahore-54590, Pakistan  
Saadat A. Siddiqi Center of Excellence in Solid State Physics, University of the Punjab, Lahore-54590, Pakistan  
S. Atiq* School of Science and Engineering, Lahore University of Management & Sciences (LUMS), Lahore 54972, Pakistan shahidatiqpasrur@yahoo.com 
M. S. Awan COMSATS Institute of Information Technology, Islamabad, Pakistan  
S. Riaz Center of Excellence in Solid State Physics, University of the Punjab, Lahore-54590, Pakistan  
Abstract:
Nanocrystalline Cu0.5Zn0.5Fe2-xAlxO2 (x=0.0, 0.1, 0.2, 0.3, 0.4, and 0.5) ferrite materials were synthesized using standard solid state reaction technique. The effects of Al3+ contents on the structural, electrical, and magnetic properties were investigated. Single phase cubic spinel structure was revealed by X-ray diffraction analysis. The crystallite size was evaluated considering the most intense diffraction peak (311) using Scherrer formula. Lattice constant decreased, whereas porosity increased with the increase in Al3+ concentration. The value of saturation magnetization decreased with increasing aluminum contents. Temperature dependent value of direct current electrical resistivity has been determined. It is observed that the substitution of Al3+ has significant impact on the dielectric constant, tangent of dielectric loss angle and dielectric loss factor. The variation in dielectric properties was attributed to space charge polarization.
Key words:  Oxide material, Ferrite, Solid state reaction, Electrical resistivity, Dielectric constant
FundProject:
Al3+掺杂的CuZn铁氧体的结构,电学和磁学特性
S. M. Ramay,Saadat A.Siddiqi,S. Atiq*,M. S. Awan,S. Riaz
摘要:
采用固相合成反应技术制备纳米Cu0.5Zn0.5Fe2-xAlxO2(x=0.0,0.1,0.2,0.3,0.4和0.5)铁氧体材料,研究Al3+含量对结构,电学和磁学性质的影响. 采用X射线衍射研究单相立方尖晶石结构. 利用Scherrer公式估算晶粒尺寸. 测定了温度依赖的直流电阻率.结果表明随Al3+含量的增加,晶格常数减小,孔隙度增加,饱和磁化强度值降低,Al3+对铁氧体的介电常数、介电损耗角的正切值和介质损耗因子等介电性能有明显影响,这可能与空间电荷极化有关.
关键词:  氧化材料,铁氧体,固相反应,电阻率,介电常数
DOI:10.1088/1674-0068/23/05/591-595
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