Investigation On Structural, Optical And Magnetic Properties Of Double Perovskite Gd_2NiMnO_6

摘要

Single phase double perovskite Gd_2NiMnO_6 was prepared by conventional solid state reaction route. X-ray diffraction (XRD) result reveals that the compound possess monoclinic structure with space group P2_1/n. Optical characterization performed at room temperature via UV-visible spectroscopy confirms Gd_2NiMnO_6 as a direct band-gap material with band gap of ～1.5 eV. Magnetization measurement in Zero field cooled (ZFC) condition at H = 100 Oe shows magnetic transition at ～125 K. Due to competing interactions between magnetic ions (Ni~(2+) and Mn~(4+)), we could observe two magnetic transition below 40 K.