Doping on the Structural and Magnetic Properties of YIG Nanoparticles

In this work, influence of dysprosium (Dy) doping on the structural and magnetic properties of Yttrium Iron Garnet (YIG) nanoparticles has been studied and results are presented. Dy doped YIG nanoparticles (Y3-xDyxFe5O12, x = 0.2) are synthesized by standard sol-gel auto combustion method using citric acid as a fuel. Pure and Dy doped YIG nanoparticles were structurally characterized by X-ray diffraction technique at room temperature. X-ray analysis proves the formation of single phase cubic garnet structure. The lattice constant found to be increasing after Dy doping. Using XRD data, X-ray density, unit cell volume and particle size were deduced and their variation with Dy doping is studied. The magnetic properties like saturation magnetization, coercivity etc were studied through hysteresis loop technique. It is observed that, the saturation magnetization decreases after Dy doping.