ISSN print edition: 0366-6352 ISSN electronic edition: 1336-9075 Registr. No.: MK SR 9/7 Published monthly

Effect of sintering temperature on the magnetic properties and charge density distribution of nano-NiO

Subramanian Saravanakumar, Ramachandran Saravanan, and Subramanian Sasikumar

Research Center and PG Department of Physics, The Madura College, Madurai, 625 011, Tamil Nadu, India

E-mail: saragow@gmail.com

Abstract: Phase pure nano nickel oxide was synthesized by the chemical precipitation method and sintered at 200°C, 400°C and 600°C, respectively, to study the effect of sintering on the charge distribution and magnetism. The samples were analyzed by X-ray diffraction for electron density distribution studies, vibrating sample magnetometry for magnetic behavior and by UV-VIS spectrophotometry for optical characteristics. Rearrangement of charge density distribution with respect to sintering temperature was analyzed through the maximum entropy method employed using powder X-ray diffraction data. The observed magnetic transition with respect to the temperature/size effect was analyzed and correlated with electron density distribution studies.

Keywords: MEM – XRD – VSM – electron density

Full paper is available at www.springerlink.com.

DOI: 10.2478/s11696-013-0519-1

Chemical Papers 68 (6) 788–797 (2014)