期刊
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
卷 10, 期 6, 页码 -出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.jece.2022.108601
关键词
Sol-gel; Semiconductors; Optical constants; Transport properties, electrical characterization
Spinel ferrites NixC1-xFe2O4 were synthesized using the sol-gel method, and their structural, magnetic, optical, and electrical properties were investigated. The results showed that the conductivity and saturation magnetization of the material increased with the introduction of Ni.
The solid solutionu NixC1-xFe2O4 (x = 0, x = 0. 2, ..., x = 1) crystallizing in the spinel structure were prepared by the Sol-Gel method at 800 degrees C. The novelty of the work is also devoted to the synthesis of the spinel ferrites NixC1-xFe2O4 (0 < x < 1) using the sol gel technique and the measurement of their structural and magnetic properties by X-ray diffraction and magnetic measurements. The structural, magnetic, optical and electrical properties were investigated. The formation of the tetragonal phase with a good crystallization and stoichiometric contents were confirmed by X-ray diffraction (x = 0 and 0.2) while a transition to cubic symmetry is observed for the other compositions. NixC1-xFe2O4 exhibits n-type conduction with an increased band gap (E-g) as Ni is introduced in the crystal lattice while it decreases with augmenting the Ni-content in the cubic phase. The transport properties are characteristic of n-type behavior where the electrical conductivity decreases up to x = 0.4. Then, it increases and the conduction is mainly governed by the thermal emission over the inter-crystallites. An average hole mobility of similar to 10(-5) cm(2) V-1 s(-1) was determined for both symmetries. Magnetic measurements revealed that the saturation magnetization (Ms) increases with the Ni-content whereas the coercivity decreases. NiFe2O4 has the largest saturation magnetization (38.16 emu/g). The optical properties namely the energy gap (E-g), reflection index (n), extinction coefficient (k), dielectric complex (epsilon), optical conductivity (sigma(opt)), dissipation factor (tan delta) and relaxation time (tau) were determined.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据