Structural and Magnetic Characterizations of Co2FeGa/SiO2 Nanoparticles Prepared via Chemical Route

TL;DR

This study synthesizes Co2FeGa/SiO2 nanoparticles via a sol-gel method, characterizing their structure and magnetic properties, revealing disorder, elemental composition, and magnetic behavior influenced by amorphous SiO2 presence.

Contribution

It provides detailed structural and magnetic characterization of Co2FeGa/SiO2 nanoparticles synthesized through a chemical route, highlighting the effects of amorphous SiO2 on magnetic properties.

Findings

Formation of A2 disordered phase confirmed by XRD

Magnetic measurements show reduced saturation magnetization

Presence of amorphous SiO2 affects magnetic behavior

Abstract

We report the synthesis of Co2FeGa/SiO2 nanoparticles by sol-gel method and characterization using x-ray diffraction (XRD), transmission electron microscopy (TEM) and magnetic measurements. The Rietveld refinements of XRD data with space group Fm-3m clearly show the formation of A2 disorder single phase and the lattice constant is found to be 5.738 {\AA}. The energy-dispersive x-ray spectroscopy (EDX) confirm the elemental composition close the desired values. The value of coercivity is found to be around 283 Oe and 126 Oe, measured at 10 K and 300 K, respectively. We observed the saturation magnetization significantly lower than expected from Slater-Pauling rule. This decrease in the magnetic moment might be due to the presence of amorphous SiO2 during the synthesis process. A large content of small size SiO2 particles along with Co2FeGa nanoparticles are also found in TEM study.