One-step synthesis of coated (Gd3+, Er3+) co-doped Co-Ni ferrite nanoparticles; structural and magnetic properties

Coated Ni0.5Co0.5Fe(2-x-y)GdxEryO4 (x = 0.3, y = 0.1) nanoparticles were synthesized by the co-precipitation method for the first time. The obtained nanoparticles were characterized by X-ray powder diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), transmission electron microscopy (TEM), thermogravimetric analysis (TGA), and Magnetic Property Measurement System (MPMS). The analysis of XDR confirms the formation of single-phase spinel with an average crystallinity size value of 18 nm. FTIR showed the formation of octahedral and tetrahedral sites and the formation of bonds between the nanoparticles and oleic acid. TEM showed the formation of quasi-spherical nanoparticles. TGA showed that oleic acid is adsorbed at the surface of the nanoparticles. The analysis of magnetic properties showed a weak ferrimagnetic behavior at 300 K and a hard ferrimagnetic behavior at 80 K and 5 K with a blocking temperature value higher than that of the ambient temperature.

Automated summary

Coated Ni0.5Co0.5Fe(2-x-y)GdxEryO4 (x = 0.3, y = 0.1) nanoparticles were synthesized for the first time using the co-precipitation method. The nanoparticles were characterized using XRD, FTIR, TEM, TGA, and MPMS, revealing magnetic properties and the formation of bonds between the nanoparticles and oleic acid.