The Influence of Zn²⁺Ions Substitution on the Microstructure and Transport Properties of Mn-Zn Nanoferrites  

作　　者：Mohamed Ali Ahmed Kasim El-Sayed Rady Kamel Mohamed El-Shokrofy Ahmed Abo Arais Mohamed Said Shams 

机构地区：[1]Materials Science Laboratory, Physics Department, Faculty of Science, Cairo University, Giza, Egypt [2]Engineering Basic Sciences Department, Faculty of Engineering, Menoufia University, Shebin El-Kom, Egypt [3]Department of Physics and Engineering Mathematics, Faculty of Electronic Engineering, Menoufia University, Al Minufya, Egypt

出　　处：《Materials Sciences and Applications》2014年第13期932-942,共11页材料科学与应用期刊（英文）

摘　　要：The effect of Zn2+ ions on the microstructure and electrical properties of Mn1-xZnxFe2O4 (0.0 ≤ x ≤ 0.5 in steps of 0.1) through a solid state reaction has been investigated. The structural properties have been investigated using X-ray diffraction (XRD) technique. The XRD analysis confirms that all samples are in a single-phase cubic spinel structure. The experimental lattice parameter (aexp) was decreased with increasing Zn2+ ions substitution due to the smaller ionic radius of zinc content. The crystallite size (t) of samples was estimated by Scherrer’s formula and found in the range (90 - 115 nm). Dc electrical resistivity and Seebeck voltage coefficients were measured as a function of temperature using the two probe methods. The temperature variation of resistivity exhibits two breaks, each break referring to a change in the activation energy. The Curie temperature estimated from dc resistivity measurement decreases with increasing Zn2+ ions. Seebeck voltage coefficient measurements reveal n-type conduction for all samples.The effect of Zn2+ ions on the microstructure and electrical properties of Mn1-xZnxFe2O4 (0.0 ≤ x ≤ 0.5 in steps of 0.1) through a solid state reaction has been investigated. The structural properties have been investigated using X-ray diffraction (XRD) technique. The XRD analysis confirms that all samples are in a single-phase cubic spinel structure. The experimental lattice parameter (aexp) was decreased with increasing Zn2+ ions substitution due to the smaller ionic radius of zinc content. The crystallite size (t) of samples was estimated by Scherrer’s formula and found in the range (90 - 115 nm). Dc electrical resistivity and Seebeck voltage coefficients were measured as a function of temperature using the two probe methods. The temperature variation of resistivity exhibits two breaks, each break referring to a change in the activation energy. The Curie temperature estimated from dc resistivity measurement decreases with increasing Zn2+ ions. Seebeck voltage coefficient measurements reveal n-type conduction for all samples.

关 键 词：MN-ZN Ferrite XRD MICROSTRUCTURE IR DC RESISTIVITY Seeback Coefficient 

分 类 号：O6[理学—化学]