Effect of Mn doping on structural, optical and magnetic properties of SnO2 nanoparticles

Abstract

The Mn doped SnO 2 nanoparticles synthesized by cost effective chemical co-precipitation method has been investigated in the present work. The main focus of the work is to explore the structural, optical and magnetic properties of the SnO 2 nanostructures. The crystallite size decreases with increase in Mn doping to SnO 2 matrix. The optical band gap of doped SnO 2 nanoparticles continuously decreases with increasing Mn ion doping concentration. All the doped SnO 2 nanoparticles show paramagnetic behavior at room temperature. SnO 2 exhibits ferromagnetic behavior in the range of low external applied magnetic field due to the presence of oxygen vacancies (V o ? ) and defects. The undoped SnO 2 nanoparticles are spherical in shape while Mn doped SnO 2 nanoparticles show the segregation of the spherically shaped nanoparticles. Mn ions only enhance the paramagnetic ordering and degrade the ferromagnetism already present in the SnO 2 nanoparticle.

Investigation of UV photosensor properties of Al-doped SnO2 thin films deposited by sol-gel dip-coating method

“…The changes in the trap depth values reveal the defect and disorder that occurs in thin films structure. For our deposited films, trap depth energy decreases with an increase in Al ratio from 0 to 5 wt.%, this indicates that the stability and idealism of crystalline structure decrease with increased Al concentration [72] , and leads to a reduction in the energy required to eliminate an electron from trap level [73] . It is confirmed by XRD results, as the strain values increase with increasing Al concentration.…”