核/壳\(\textbf{CoFe}_{2}\textbf{O}_{4}/\textbf{Fe}_{3}\textbf{O}_{4}\)纳米粒子:硬/软磁重量分数对结构、粒径和磁性能的影响

T. Nga, Chu Manh Hung, Truong Tien Hoang Duong
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引用次数: 0

摘要

采用共沉淀法结合水热法合成了CoFe \(_{2}\) O \(_{4}\) /Fe \(_{3}\) O \(_{4}\)纳米复合颗粒。利用X射线衍射仪、扫描电镜和振动样品磁强计对纳米复合材料的相组成、表面形貌和磁性能进行了研究。结果表明,样品由两相组成,Fe \(_{3}\) O \(_{4}\)颗粒包覆在CoFe \(_{2}\) O \(_{4}\)颗粒表面。CoFe \(_{2}\) O \(_{4}\)的平均粒径分布在50 ~ 100 nm之间。而Fe \(_{3}\) O \(_{4}\)颗粒呈球形,粒径分布在10 ~ 20 nm之间。CoFe \(_{2}\) O \(_{4}\) @Fe \(_{3}\) O \(_{4}\)核壳粒子的质谱随软硬铁氧体质量比的减小而增大。研究了其结构、磁性能和磁相间的交换耦合程度。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Core/shell \(\textbf{CoFe}_{2}\textbf{O}_{4}/\textbf{Fe}_{3}\textbf{O}_{4}\) Nanoparticles: Effects of Hard/soft Magnetic Weight Fraction on Structure, Particle Size and Magnetic Properties
CoFe\(_{2}\)O\(_{4}\)/Fe\(_{3}\)O\(_{4}\) nanocomposite particles were synthesized by using co-precipitation combined with hydrothermal methods. The phase composition, surface morphology and magnetic properties of the nanocomposites were investigated using X- ray diffraction, scanning electron microscopy and vibrating sample magnetometer. Findings show that the samples comprise two phases, and Fe\(_{3}\)O\(_{4}\) particles are coated on the surface of CoFe\(_{2}\)O\(_{4}\) particles. The average particle size of CoFe\(_{2}\)O\(_{4}\) was ditrisbuted in the range of 50 -- 100 nm. While the particle of Fe\(_{3}\)O\(_{4}\) displayed a spherical shape and particle size distributed from 10 -- 20 nm. The MS of CoFe\(_{2}\)O\(_{4}\)@Fe\(_{3}\)O\(_{4}\) core–shell particles increase with the decrease in the mass ratio of hard to soft ferrites. The structure, magnetic properties and the degree of exchange coupling between the magnetic phases were investigated.
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