The Comparative Study of the Structural and the Electrical Properties of the Nano Spinel Ferrites Prepared by the Soft Mehanochemical Synthesis

  • D. L. Sekulić Faculty of Technical Sciences, University of Novi Sad
  • Z. Ž. Lazarević Institute of Physics, University of Belgrade
  • Č. Jovalekić Institute for Multidisciplinary Research, University of Belgrade
  • A. Rečnik Department for Nanostructured Materials, Jožef Stefan Institute
  • M. Romčević Institute of Physics, University of Belgrade
  • B. Hadžić Institute of Physics, University of Belgrade
  • N. Ž. Romčević Institute of Physics, University of Belgrade

Abstract

Nano spinel ferrites MFe2O4 (M= Ni, Mn, Zn) were obtained by soft mechanochemical synthesis in a planetary ball mill. The appropriate mixture of oxide and hydroxide powders was used as initial compounds. All of this mixture of powders was mechanically activated, uniaxial pressed and sintered at 1100°C/2h. The phase composition of the powders and sintered samples were analyzed by XRD and Raman spectroscopy. Morphologies were examined by SEM. In this study, the AC-conductivity and DC-resistivity of sintered samples of MFe2O4 (M= Ni, Mn, Zn) ferrites were measured at different frequencies and at room temperature. The values of the electrical conductivities show an increase with increasing temperature, which indicated the semiconducting behavior of the studied ferrites. The conduction phenomenon of the investigated samples could be explained on the basis of hopping model. The complex impedance spectroscopy analysis was used to study the effect of grain and grain boundary on the electrical properties of all three obtained ferrites.

Published
2017-12-13
Issue
Vol 46 No 2 (2014)
Section
Articles

Copyright 

Authors retain copyright of the published article and have the right to use the article in the ways permitted to third parties under the Creative Commons Attribution 4.0 International license. Full bibliographic information (authors, article title, journal title, volume, issue, pages) about the original publication must be provided and a link must be made to the article's DOI. This license allows to copy and redistribute the material in any medium or format, remix, transform, and build upon it for any purpose, even commercially, as long as appropriate credit is given to the original author(s), a link to the license is provided and it is indicated if changes were made.