The Influence of Zn<sup>2+</sup>Ions Substitution on the Microstructure and Transport Properties of Mn-Zn Nanoferrites
The Influence of Zn<sup>2+</sup>Ions Substitution on the Microstructure and Transport Properties of Mn-Zn Nanoferrites作者机构：Materials Science Laboratory Physics Department Faculty of Science Cairo University Giza Egypt Engineering Basic Sciences Department Faculty of Engineering Menoufia University Shebin El-Kom Egypt Department of Physics and Engineering Mathematics Faculty of Electronic Engineering Menoufia University Al Minufya Egypt
出 版 物：《Materials Sciences and Applications》 (材料科学与应用期刊（英文）)
年 卷 期：2014年第5卷第13期
页 面：932-942页
主 题：Mn-Zn Ferrite XRD Microstructure IR DC Resistivity Seeback Coefficient
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.
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