STRUCTURE AND MAGNETIC PROPERTIES OF Fe3O4/CoFe2O4 COMPOSITES NANOPARTICLES SYSTEMS

Lê Thị Hồng Phong; Nguyễn Thị Ngọc Anh; Phạm Hồng Nam; Đỗ Hùng Mạnh

doi:10.34238/tnu-jst.10798

STRUCTURE AND MAGNETIC PROPERTIES OF Fe3O4/CoFe2O4 COMPOSITES NANOPARTICLES SYSTEMS

About this article

Received: 22/07/24 Revised: 07/10/24 Published: 08/10/24

Authors

1. Le Thi Hong Phong , Institute of Materials Science - Vietnam Academy of Science and Technology
2. Nguyen Thi Ngoc Anh, Institute of Materials Science - Vietnam Academy of Science and Technology
3. Pham Hong Nam, Institute of Materials Science - Vietnam Academy of Science and Technology
4. Do Hung Manh, Institute of Materials Science - Vietnam Academy of Science and Technology

Abstract

Composite two-component nanoparticle systems are being researched and developed in many laboratories thanks to advances in chemical synthesis. Core-shell Fe₃O₄-based composite two-component nanomaterials have shown improvements in several properties compared to single-component materials. In this study, composite nanomaterials containing two magnetic components including Fe₃O₄ and CoFe₂O₄ with different shell thicknesses were synthesized using seed-mediated growth combined with thermal decomposition method. Results from X-ray diffraction (XRD) patterns and scanning transmission electron microscopy combined with energy-dispersive X-ray spectroscopy mapping (STEM-EDX Mapping) showed that the nanocomposite materials were formed with core-shell morphology of Fe₃O₄@CoFe₂O₄. The Fe₃O₄ core particle size is about 18 nm and the CoFe₂O₄ shell thickness varies from 2-9 nm. Magnetic measurements performed using both normal powder pressing and particle embedding in a wax matrix indicated that both interparticle interactions and intraparticle interactions between the Fe₃O₄ core and the CoFe₂O₄ shell influence the magnetic properties. Additionally, the magnetic properties were also affected by the shell thickness.

Keywords

Core-shell nanostructure; Nanocomposite; Fe3O4@CoFe2O4; Intraparticle; Interparticle

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DOI: https://doi.org/10.34238/tnu-jst.10798

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