In this paper, the behaviour of the optical band gap and ac conductivity of Mn-Zn nanoferrites with the variation of the Zn concentration is reported. It was observed that in spite of a slight increase in the optical band gap, ac conductivity increases with the increase in Zn concentration. The observed behaviour has been explained in terms of the dominating factor which plays a key role in determining its properties. Optical band gap has a strong dependence on the crystallite size while the ac conductivity depends on the availability of the charge carriers for conduction and applied frequency. With the variation in Zn concentration, the above-mentioned important factors change which affect both the properties. A comparative examination of the optical band gap and ac conductivity of the prepared samples clearly gives support to the hopping of the charge carriers as the conduction mechanism in ferrites.
This is a preview of subscription content,to check access.
Access this article
Similar content being viewed by others
Baykal, A., Guner, S., Demir, A., Esir, S., Genc, F.: Effect of zinc substitution on magneto-optical properties of Mn1−x ZnxFe2O4/SiO2 nanocomposites. Ceram. Int. 40, 13401–13408 (2014)
Baykal, A., Guner, S., Demir, A.: Synthesis and magneto-optical properties of triethylene glycol stabilized Mn1−xZnxFe2O4 nanoparticles. J. Alloys Compd. 619, 5–11 (2015)
Demir, A., Guner, S., Bakis, Y., Esir, S., Baykal, A.: Magnetic and optical properties of Mn1−xZnxFe2O4 nanoparticles. J. Inorg. Organomet. Polym. 24, 729–736 (2014)
Devi, E.C., Soibam, I.: Effect of Zn doping on the structural, electrical and magnetic properties of MnFe2O4 nanoparticles. Indian J. Phys. 91, 861–867 (2017)
Sahana, M.B., Sudakar, C., Setzier, G., Dixit, A., Thakur, J.S., Lawer, G., Naik, R., Naik, V.M., Vaishnava, P.P.: Bandgap engineering by tuning particle size and crystallinity of SnO2-Fe2O3 nanocrystalline composite thin films. Appl. Phys. Lett. 93, 231909 (2008)
Abdeen, A.M.: Electric conduction in Ni-Zn ferrites. J. Magn. Magn. Mater. 185, 199–206 (1998)
Lazarevic, Z.Z., Jovalekic, C., Milutinovic, A., Sekulic, D., Ivanovski, V.N., Recnik, A., Cekic, B., Romcevic, N.Z.: Nanodimensional spinel NiFe2O4 and ZnFe2O4 ferrites prepared by soft mechanochemical synthesis. J. Appl. Phys. 113, 187221 (2013)
Devi, E.C., Soibam, I.: (in press) Structural and electrical studies of Mn-Ni mixed nanoferrites. Int. J. Nanopart.
Guner, S., Esir, S., Baykal, A., Demir, A., Bakis, Y.: Magneto-optical properties of Cu1−xZnxFe2O4 nanoparticles. Superlattices Microstruct. 74, 184–197 (2014)
Li, Y., Jiang, J., Zhao, J.: X-ray diffraction and Mossbauer studies of phase transformation in manganese ferrite prepared by combustion synthesis method. Mater. Chem. Phys. 87, 91–95 (2004)
Verma, A., Chatterjee, R.: Effect of zinc concentration on the structural, electrical and magnetic properties of mixed Mn-Zn and Ni-Zn ferrites synthesized by the citrate precursor technique. J. Magn. Magn. Mater. 306, 313–320 (2006)
The authors are grateful to DST-SAIF, Kochi, for the SEM measurement and Department of Chemistry, NIT Manipur, for the UV-visible absorption spectroscopy measurement.
About this article
Cite this article
Devi, E., Soibam, I. An Investigation on the Optical Band Gap and Ac Conductivity of Mn-Zn Nanoferrites. J Supercond Nov Magn 31, 1183–1188 (2018). https://doi.org/10.1007/s10948-017-4294-z