Synthesis and magnetic properties of (Fe, Sn) co-doped In_2O_3 nanoparticles

摘要

The iron (Fe) and tin (Sn) co-doped indium oxide (In_2O_3) nanoparticles at different Fe doping concentrations were prepared by solid state reaction and studied for their structural, optical and magnetic properties. The XRD patterns confirmed the cubic structure of all the undoped and co-doped samples. The average crystallite size decreased on increasing from 41 to 32 nm by increase of Fe doping concentration from 5 to 15 at.%. The optical band gap of the samples was found to decrease from 2.89 to 2.77 eV by increasing the Fe dopant concentration. The magnetic properties of the nanoparticles were studied using vibrating sample magnetometer at room temperature and at 100 K by applying the field ±75,000 Oe perpendicular to the sample. The magnetization increased with increase of applied magnetic field and no saturation was observed in all the samples. The similar behavior was observed for the nanoparticles studied at 100 K.