Synthesis and room temperature magnetic behavior of nickel oxide nanocrystallites
Kwanruthai Wongsaprom1*and Santi Maensiri 2* Author for corresponding; e-mail address: wkwanruthai@gmail.com
Volume: Vol.40 No.1 (JANUARY 2013)
Research Article
DOI:
Received: 28 November 2011, Revised: -, Accepted: 29 June 2012, Published: -
Citation: 2 K.W.S.M., Synthesis and room temperature magnetic behavior of nickel oxide nanocrystallites , Chiang Mai Journal of Science, 2013; 40(1): 99-108.
Abstract
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 (Eg) 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.