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Structure and magnetic properties of multi-morphological CoFe 2 O 4 /CoFe nanocomposites by one-step hydrothermal synthesis
Ceramics International ( IF 5.2 ) Pub Date : 2018-06-01 , DOI: 10.1016/j.ceramint.2018.02.152
Shichong Xu , Zhihe Wang , Rui Su , Na Han , Ailing Xie , Li Wang , Haibo Li

Abstract Multi-morphological CoFe 2 O 4 /CoFe nanocomposites have been synthesized using a facile hydrothermal process. The effects of hydrazine hydrate amount during hydrothermal reaction on the structure and magnetic property of the specimens were studied. With increasing hydrazine hydrate amount, the CoFe 2 O 4 transformed to CoFe and the morphology of the specimen changed from granular particles to faceted particles. The saturation magnetization monotonically increased and the coercivity monotonically decreased with increasing hydrazine hydrate amount. The magnetic interactions, determining the magnetic properties of the composites, result from the dominant dipole coupling and relative weak exchange coupling between CoFe 2 O 4 and CoFe nanoparticles. The CoFe 2 O 4 /CoFe nanocomposite prepared with 2 mL hydrazine hydrate exhibited the optimal magnetic properties, with the saturation magnetization of 81 emu/g and coercivity of 636 Oe.

中文翻译:

一步水热合成多形貌CoFe 2 O 4 /CoFe纳米复合材料的结构和磁性能

摘要 多形态的 CoFe 2 O 4 /CoFe 纳米复合材料已使用简便的水热法合成。研究了水热反应过程中水合肼用量对试样结构和磁性能的影响。随着水合肼用量的增加,CoFe 2 O 4 转变为CoFe,试样的形貌从颗粒状颗粒变为小面状颗粒。随着水合肼用量的增加,饱和磁化强度单调增加,矫顽力单调降低。决定复合材料磁性的磁相互作用是由 CoFe 2 O 4 和 CoFe 纳米颗粒之间的主要偶极耦合和相对弱交换耦合引起的。
更新日期:2018-06-01
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