Unexpected magnetic properties explained by the homogeneity of mixed ferrites

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• 作者：M. Saidani^a ; ^{mohamed1saidani@gmail.com} ; W. Belkacem^a ; J.F. Bardeau^b ; A. Bezergheanu^c ; L. Patout^d ; N. Mliki^a
• 关键词：Mixed ferrites ; Diffraction limitations ; Exchange coupling ; In situ micro Raman ; Homogeneity ; Local spectroscopy
• 刊名：Journal of Alloys and Compounds
• 出版年：2017
• 出版时间：25 February 2017
• 年：2017
• 卷：695
• 期：Complete
• 页码：183-193
• 全文大小：3316 K
• 卷排序：695

文摘

Cobalt ferrites CoxFe3−xO4 (0 ≤ x ≤ 1, step 0.2) were synthesized with solvothermal route. X ray and electron diffractions have shown limitations for the structural properties for CoxFe3−xO4 samples ( 0 ≤ x ≤ 1) synthesized with solvothermal route. Transmission Electron Microscopy images display spheriodal and quasi-rectangular nanoparticles. Magnetization curves gave exchange coupling behavior, disappeared by heat treatments. Phase transformation, under heat treatment and Raman spectroscopy, occurred, confirming the presence of two phases. In situ micro-Raman spectroscopy, under different laser irradiation, as local probe gave information about these phases.