Structural and magnetic studies on Co-Zn nanoferrite synthesized via sol-gel and combustion methods

Open access


Co–Zn nanocrystalline ferrites with chemical composition Co0:5Zn0:5Fe2O4 were synthesized by sol-gel and combustion methods. The sol-gel method was carried out in two ways, i.e. based on chelating agents PVA and PEG of high and low molecular weights. In auto-combustion method, the ratio of citric acid to metal nitrate was taken as 1:1, while in sol-gel method the chelating agents were taken based on oxygen balance. All the three samples were studied by thermogravimetric and differential thermal analysis for the identification of phase formation and ferritization temperature. The synthesized samples were characterized by powder X-ray diffraction and FT-IR spectroscopy without any thermal treatment. The measured lattice constants and observed characteristic IR absorption bands of the three samples are in good agreement with the reported values showing the formation of a cubic spinel structure. The crystallite sizes of all samples were determined using high intensity peaks and W-H plot. Size-Strain Plot method was also implemented since two of the samples showed low crystallite sizes. The least crystallite size (5.5 nm) was observed for the sample CZVP while the highest (23.8 nm) was observed for the sample CZCA. Cation distribution was proposed based on calculated and observed intensity ratios of selected planes from X ray diffraction data. All structural parameters were presented using experimental lattice constant and oxygen positional parameter, and they correlated with FT-IR results. Magnetic measurements were carried out using vibrating sample magnetometer at room temperature to obtain the characteristic parameters such as saturation magnetization, coercivity, remanence, squareness ratio and Bohr magnetons. Among all, the sample synthesized via citric acid autocombustion method displayed a remarkably higher magnetization of 53 emu/g and the remaining two samples displayed low magnetization values owing to their smaller crystallite sizes.

If the inline PDF is not rendering correctly, you can download the PDF file here.

  • [1] Raghvendra Singh Y. Jaromir H. Miroslav H. Pavol S. Cigan A. Martin P. Eva B. Martin B. Františka F. Jiri M. Martin Z. Lukas K. Miroslava H. Vojtěch E. J. Magn. Magn. Mater. 378 (2015) 190.

  • [2] Dzmitry K. Maria I. Vladimir P. Yulia F. Solid State Sci. 39 (2015) 69.

  • [3] Majid Niaz A. Rahman A. Sulong A.B. Muhammad A.K. J. Magn. Magn. Mater. 421 (2017) 260.

  • [4] Manikandan V. Vanitha A. Ranjith Kumar E. Kavita S. J. Magn. Magn. Mater. 426 (2017) 11.

  • [5] Tasawar J. Asghari M. Akhlaq A.M. J. Supercond. Nov. Magn. 24 (2011) 2137.

  • [6] Andris S. Gundars M. Front. Mater. Sci. 6 (2012) 128.

  • [7] Kashinath C.P. Aruna S.T. Tanu M. Curr. Opin. Solid St. M. 6 (2002) 507.

  • [8] Raut A.V. Barkule R.S. Shengule D.R. Jadhav K.M. J. Magn. Magn. Mater. 358 – 359 (2014) 87.

  • [9] Deraz N.M. Alarifi A. J. Anal. Appl. Pyrol. 94 (2012) 41.

  • [10] Gozuak F. Koseoglu Y. Baykal A. Kavas H. J. Magn. Magn. Mater. 321 (2009) 2170.

  • [11] Shivaji R.K. Sanjay S.K. Pramod N.J. Vashishtha M.G. Duryodhan P.W. Govind B.K. Sandip R.S. Sambhaji R.B. Mater. Lett. 84 (2012) 169.

  • [12] Sonal S. Sharma R. Namgyal T. Jauhar S. Bhukal S. Kaur J. Ceram. Int. 38 (2012) 2773.

  • [13] Bhukal S. Mor S. Bansal S. Singh J. Singhal S. J. Mol. Struct. 1071 (2014) 95.

  • [14] Danks A.E. Hall S.R. Mater. Horiz. 3 (2016) 91.

  • [15] Seongok Han Kim C. Kwon D. Polymer 38 (1997) 317.

  • [16] Vara Prasad B.B.V.S. Mod. Phys. Lett. B 28 (2014) 1450155.

  • [17] Lakhani V.K Pathak T.K. Vasoya N.H. Modi K.B. Solid State Sci. 13 (2011) 539.

  • [18] Maniammal K. Madhu G. Bijua V. Physica E 85 (2017) 214.

  • [19] Buerger M.J. Crystal Structure AnalysisWiley New York 1960.

  • [20] Shannon R.D. Acta Crystallogr. A 32 (1976) 751.

  • [21] Vara Prasad B.B.V.S. Rajesh Babu B. Sivaram Prasad M. Mater. Sci.-Poland 33 (2015) 806.

  • [22] Mohammed K.A. Al-Rawas A.D. Gismelseed A.M. Sellai A. Physica B 407 (2012) 795.

  • [23] Josyulu O.S. Sobhanadri J Phys. Status Solidi A 65 (1981) 479.

  • [24] Reddy P. V. Salagram M. Phys. Status Solidi A 100 (1987) 639.

  • [25] Prasad M. S. R. Prasad B. B.V.S.V. Rajesh B. Rao K. H. Ramesh K.V. J. Magn. Magn. Mater. 323 (2011) 2115.

Journal information
Impact Factor

IMPACT FACTOR 2018: 0.918
5-year IMPACT FACTOR: 0.916

CiteScore 2018: 1.01

SCImago Journal Rank (SJR) 2018: 0.275
Source Normalized Impact per Paper (SNIP) 2018: 0.561

All Time Past Year Past 30 Days
Abstract Views 0 0 0
Full Text Views 549 549 18
PDF Downloads 237 237 22