Chiang Mai Journal of Science

Nickel oxide (NiO) nanocrystallites with a crystal size of around 54 nm have been synthesized via the polymerized complex method. The synthesized precursor was calcined at 873 K for 4 h to obtain the nickel oxide nanocrystallites. The XRD and electron diffraction analysis results indicated that the calcined sample has a cubic structure without any impurity phases. The FT-IR analysis result confirmed the formation of NiO. The NiO nanocrystallites exhibited UV absorption below 2.76 eV and the estimated direct band gap (E_g) of 3.06 eV. The Room temperature magnetization result revealed a ferromagnetic-like behavior and a coercivity of 149 Oe. The ferromagnetic-like properties are attributed to the lattice distortion and broken bond in the NiO nanocrystallites.