SnO2 nanoparticle reformed their magnetic properties by the efficiency of dopant cobalt (Co) in (Tin) Sn sites

Abstract

Cobalt doped SnO2 nanoparticles were prepared for different molar concentration 2%, 4% & 6% of Co by Chemical co precipitation method. The prepared samples were characterized by X-ray diffraction (XRD), Scanning electron Microscopy (SEM) and Vibrating sample magnetometer for their Structural, Magnetic Properties. The doping concentration of Co induces crystal phase, crystallite size, lattice distortion, optical and magnetic properties were investigated. XRD Results showed that Co2+ replaces Sn4+ in the crystal lattice of SnO2, which enhanced the growth of crystallite size and suppressed the transformation from anatase to rutile phase due to lattice distortion produced in SnO2. An efficient method for inducing the ferromagnetic behavior from increasing the Co concentration from 2 to 6% was known from the magnetization versus magnetic field (M−H) curves at room temperature of the Co doped SnO2 samples. The dominant magnetic interaction between Co ions, and hence, the ferromagnetic behaviour increases for increase in Co2+ doping concentration. Consequently, to achieve the good ferromagnetic character in these materials, the concentration of Co dopant has to be properly optimized.