Synthesis of M–Nd doped Fe3O4 nanoparticles (M = Co, Ce, Cr, Ni) with tunable magnetic properties

M Yousefi,P Alimard

doi:10.4314/bcse.v27i1.5

Abstract

Magnetic nanoparticles were prepared by the aqueous co-precipitation method. The magnetic nanoparticles obtained were characterized systematically through the use of an X-ray diffraction (XRD), energy dispersive X-ray spectroscopy (EDS), scanning electron microscope (SEM), transmission electron microscope (TEM), Fourier transform infrared spectroscopy (FT-IR) and a vibrating sampling magnetometer (VSM). The results revealed that the magnetic nanoparticles were spherical shaped with inverse spinel structure. The size of Fe3O4 and Nd-Co doped Fe3O4 magnetic nanoparticles were approximately 15 nm. Magnetic measurement revealed that the nanoparticles were super paramagnetic at room temperature. It was found that the magnetic response of the Fe3O4 increased when it was doped with Nd3+ and Co2+. However, the magnetic response of the Fe3O4 decreased when it was doped with Nd3+ or Ce3+ or Cr3+or Ni2+. KEYWORDS: Fe3O4, Magnetic nanoparticles, Superparamagnetic, Magnetite, Fe3O4 doped Bull. Chem. Soc. Ethiop. 2013, 27(1), 49-56.DOI: http://dx.doi.org/10.4314/bcse.v27i1.5

Highlights

Nanoparticles (NPs) have been a topic of intense research mainly because of their unique physical and chemical properties compared to their bulky counterparts
Many reports proved that the property of spinel ferrites can be improved by doping metal elements in MFe2O4 owing to their enhanced crystal anisotropy [13]
The magnetic properties of the composite were measured on a vibrating sampling magnetometer (VSM) 7307 (Lakeshore Co.).A Philips (EL30) was used to obtain a scanning electron microscope analysis (SEM) and an energy dispersive X-ray spectroscopy (EDS)

Summary

Introduction

Nanoparticles (NPs) have been a topic of intense research mainly because of their unique physical and chemical properties compared to their bulky counterparts. To obtain nano sized spinel ferrite particles, various preparation techniques have been developed. A new series of Nd, Nd-Co, Nd-Ce, Nd-Cr, Nd-Ni doped Fe3O4 nanoparticles were successfully synthesized by co-precipitation method.

Results

Conclusion