Near infrared emission and enhanced ferromagnetism in Fe doped SrSnO_3 perovskite structured nanorods

摘要

SrSn1-xFexO3 (x=0, 0.01, 0.03 and 0.05) nanorods prepared by chemical precipitation method was investigated for the effect of Fe doping on structural, optical and magnetic properties. X-ray diffraction pattern of the prepared samples indicated orthorhombic structure with considerable variation in the lattice parameters, confirming the Fe incorporation in Sr-Sn-O lattice. Electron microscopy studies revealed the surface morphology changes from rods with poly-dispersed particles to well-defined rod shapes, upon Fe doping. FTIR, Raman, X-ray photoelectron and UV-Vis spectroscopy results confirmed the presence of metal oxide vibrations, active Raman modes, oxygen vacancy and strong optical absorption, respectively. Photoluminescence studies showed an interesting feature of near-infrared emission for the Fe doped samples. Magnetization measurements at room temperature demonstrated dia- to ferro- magnetic phase transition as a result of increased Fe concentration. Fe 5% doped sample significantly exhibited an increased coercivity with a maximum at 2K. The induced ferromagnetic behavior and near infrared emission in Fe doped SrSnO3 suggest the material for magneto-electronic device applications.