Core/shell CoFe\(_{2}\)O\(_{4}\)/Fe\(_{3}\)O\(_{4}\) nanoparticles: effects of hard/soft magnetic weight fraction on structure, particle size and magnetic properties

Tran Thi Viet Nga, Chu Manh Hung, Truong Tien Hoang Duong
Author affiliations

Authors

  • Tran Thi Viet Nga International Training Institute for Materials Science (ITIMS) Hanoi University of Technology, 01 Dai Co Viet Street, Hanoi, Vietnam
  • Chu Manh Hung International Institute for Materials Science, Hanoi University of Science and Technology, Hanoi, Vietnam https://orcid.org/0000-0003-0813-1956
  • Truong Tien Hoang Duong International Institute for Materials Science, Hanoi University of Science and Technology, Hanoi, Vietnam https://orcid.org/0000-0003-4952-0405

DOI:

https://doi.org/10.15625/0868-3166/17312

Keywords:

nanocomposite, core- shell, exchange- spring

Abstract

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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Published

21-02-2023

How to Cite

[1]
T. T. V. Nga, C. M. Hung, and T. T. H. Duong, “Core/shell CoFe\(_{2}\)O\(_{4}\)/Fe\(_{3}\)O\(_{4}\) nanoparticles: effects of hard/soft magnetic weight fraction on structure, particle size and magnetic properties”, Comm. Phys., vol. 33, no. 1, p. 41, Feb. 2023.

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Papers
Received 13-07-2022
Accepted 17-10-2022
Published 21-02-2023