Characterization of nanostructured Mno synthesized by modified combustion technique Sherin J.S1, Haris M.1, Manoj D. Shiney2, Thomas J.K.3 1Department of Physics, Karunya University, Coimbatore-641114, India 2Department of Physics, Christian College Kattakada, University of Kerala, Thiruvananthapuram-695572, Kerala, India 3Department of Physics, Electronic Materials Research Laboratory, Mar Ivanios college, University of Kerala, Thiruvananthapuram-695015, Kerala, India Online published on 8 May, 2017. Abstract We have studied the magnetic properties of MnO synthetized by auto igniting modified combustion technique and its suitability for various applications are reported. The structure and phase purity of the sample analysed by X-ray diffraction, the particle size from the transmission electron microscopy and scanning electron microscopy is 45nm and specifies spherical shape for MnO nanoparticles. The optical properties of the nano MnO are studied using UV-visible absorption spectroscopy which showed that the material is a wide band gap semiconductor with band gap of 3.15 eV. The sample points out maximum absorbance in visible-near infrared region. The photoluminescence spectra indicate intense emission in blue region. Magnetic measurements indicate that the blocking temperature of the MnO structures is 22.4K for Hc = 100 Oe. The magnetization and coercivity of the nanocrystal under FC condition is found to be 0.5709 emu/g and 50.21 G. It is shown that MnO nanoparticles exhibits weak ferromagnetic behaviour due to uncompensated surface spins at low temperature. Top Keywords MnO, Nanoparticles, Facile Combustion, Characterization. Top |