Magnetic phase transition in Co0.5Zn0.5Fe2O4 nanoparticles
Muhammad Misbah Muhammad Zulkimi, Ismayadi Ismail
The objective of this work is to expose and explain experimental microstructure property relationship with magnetic properties as they evolved with increasing sintering temperature. Mechanical alloying (MA) was used to prepare Co0.5Zn0.5Fe2O4 nanoparticles with sintering temperature from 600oC to 1350oC with an increment of 50oC. The phase changes, grain size and magnetic properties were measured. Magnetic parameter, namely, hysteresis loop was measured at room temperature for samples sintered from 600oC to 1350oC. The results showed that Cobalt zinc ferrite cannot be formed directly through milling alone, but heat treatment was necessary. After annealing the sample at 600oC, cobalt zinc ferrite phase was first obtained with an average grain size in the nanometric range (0.089µm). B-H hysteresis loops could be categorized into three distinct groups according to their shapes. The activation energy value increased with increasing grain size caused by the increasing temperature, and found to be 7.58 kJ/mol, 47.11 kJ/mol and 189.54 kJ/mol. The slopes of the activation energy corresponded to the three different groups for magnetic properties (B-H loops). Meanwhile, the resistivity could be classified into two parts based on their shape of the graph, and their values decreased with increasing temperature which confirmed that the sintered samples under investigation possessed an semiconducting behavior.
Keywords
Mechanical Alloying, Magnetic Parameters, Resistivity
Published online 1/1/2017, 23 pages
DOI: https://dx.doi.org/10.21741/9781945291135-7
Part of Contemporary Dielectric Materials
References
[1] Qu, Y., Yang, H., Yang, N., Fan, Y., Zhu, H., Zou, G.,The effect of reaction temperature on the particle size, structure and magnetic properties of coprecipitated CoFe2O4 nanoparticles, Mater. Lett., 60, 3548-3552(2006). https://dx.doi.org/10.1016/j.matlet.2006.03.055
[2] Sun, K., Z. Ian, S. Chen, Y. Sun and Z. Yu,Effect of sintering process on microstructure and magnetic properties of high frequency power ferrite, Rare Metals,25(2006)., 509-514. https://dx.doi.org/10.1016/S1001-0521(07)60135-1
[3] Azadmanjiri, J. Structural and electromagnetic properties of Ni–Zn ferrites prepared by sol–gel combustion method J. Materials Chemistry and Physics, 109(1) (2008)., 109-112. https://dx.doi.org/10.1016/j.matchemphys.2007.11.001
[4] Gul I. H., Abbasi a. Z., Amin F., Anis-ur-Rehma M., and Maqsood a. Structural, magnetic and electrical properties of Co1−xZnxFe2O4 synthesized by co-precipitation method Journal of Magnetism and Magnetic Materials, 311(2) (2007), 494-499. https://dx.doi.org/10.1016/j.jmmm.2006.08.005
[5] Sharifi I and Shokrollahi H. Nano structural, magnetic and Mossbauer studies of nano sized Co1_xZnxFe2O4 synthesized by co-precipitation. Journal of Magnetism and Magnetic Materials, 324(15) (2012)., 2397-2403. https://dx.doi.org/10.1016/j.jmmm.2012.03.008
[6] Idza I. R., Hashim M., Rodziah N., Ismayadi I., and Norailiana a. R. Influence of evolving microstructure on magnetic-hysteresis characteristics in polycrystalline nickel–zinc ferrite, Ni0.3Zn0.7Fe2O4.Materials Research Bulletin, 47(6) (2012), 1345-1352. https://dx.doi.org/10.1016/j.materresbull.2012.03.007
[7] Ismail, I. M. Hashim, I.R. Ibrahim, R. Nazlan, F. MohdIdris, S.E. Shafie, M. Manap, G. Bahmanrokh, N.H. Abdullah, W.N. Wan Rahman, Crystallinity and magnetic properties dependence on sintering temperature and soaking time of mechanically alloyed nanometer-grain Ni0.5Zn0.5Fe2O4, Journal of Magnetism and Magnetic Materials, Vol (333), 2013, 100-107
[8] C.P. Bean, Hysteresis loops of mixtures ferromagnetic micropowders. J. Appl. Phys. 26 (1955) 1381–1383. https://dx.doi.org/10.1063/1.1721912
[9] Sánchez, R.D., Rivas, J., Vaqueiro, P., López-Quintela, M.A., Caeiro, D., Particle size effects on magnetic properties of yttrium iron garnets prepared by a sol–gel method, Journal of Magnetism and Magnetic Materials, 247 (1) (2002), 92–98. https://dx.doi.org/10.1016/S0304-8853(02)00170-1
[10] Mott, N. F.. 1. The model for hopping conduction in glasses (1968).
[11] Khan, H. M.. Materials Sciences and Applications, 02(08)(2011), 1083-1089. https://dx.doi.org/10.4236/msa.2011.28146
[12] Viswanathan, B. and Murthy, V.R.K., Ferrite Materials: Science and Technology, Narosa Publishing House(1990).,
[13] Coble, R.L.,Sintering crystalline solids, 1. Intermediate and final state diffusions models.J. Appl. Phys. 32(1961), 787-792. https://dx.doi.org/10.1063/1.1736107
[14] Jarcho, M., Bolen, C.H., Thomas, M.B., Bobick, J., Kay, J.K., Doremus, R.H.,Hydroxylapatite synthesis and characterization in dense polycrastalline form.J. Mater Sci11 (1976)., 2027-2035. https://dx.doi.org/10.1007/PL00020328
[15] Sandra Galmarini. Work practices “Ceramics Process”: TP3 Sintering 1-15(2011).
