Effect of Substitution of Zn²⁺ and Zr⁴⁺ on Structural and Magnetic Properties of BaFe₁₂O₁₉ Powders

Abstract:

The Zn²⁺ and Zr⁴⁺-doped barium hexaferrite according to the stoichiometric formation BaFe_{(12-(2x /3))}Zn_xO₁₉ and BaFe_{(12-(4x /3))}Zr_xO₁₉ with x = 0, 0.1, 0.3 and 0.5 were prepared by conventional method using ball milling technique. These powders were calcined at various temperatures from 1000 °C to 1200 °C for 2 h. The structural, morphology and magnetic properties were carried out by X-ray diffraction (XRD), scanning electron microscopy (SEM) and vibrating sample magnetometer (VSM), respectively. The XRD confirmed the formation of main phase magneplumbite and the crystalline structure of samples is still hexagonal. Pure and dopes barium hexaferrite shows only single phase. The lattice parameter a and c increased with the Zn²⁺ and Zr⁴⁺ ion content increasing. The SEM results showed that the particles of pure BaFe₁₂O₁₉ were regular hexagonal while doped-samples showed spherical shape. After Fe³⁺ is partly substituted with Zn²⁺, the magnetic parameters like coercivity and saturation magnetization are decreased. On the other hand, with increasing Zr⁴⁺ ions, the coercive force and saturation magnetization are slightly increased. The behavior of magnetic properties of materials is explained by the combined effect of the coherent rotation of the magnetic domains and the replacements of Fe³⁺ by Zn²⁺ and Zr⁴⁺ ions in the tetrahedral and octahedral sites.

• Periodical: Key Engineering Materials (Volume 690)
• Pages: 76-80
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.690.76
• Online since: May 2016
• Authors: Rewadee Wongmaneerung
• Keywords: Barium Hexaferrite, Hard Magnetics, Magnetic Properties

References

[1] D.R. Richerson, Modern Ceramic Engineering, Marcel Dekker, Inc., NY, 1992, 294.

[2] D.J. Crail, R.S. Tebble, Ferromagnetism and Ferromagnetic Domains, vol. IV, in: E.P. Wolfarth (Ed. ), JohnWiley & Sons, Inc., New York, 1965, p.99.

[3] Information on http: /www. aacg. bham. ac. uk/magnetic materials.

[4] D. Lisijak, M. Drofenik, The mechanism of the low-temperature formation of barium hexaferrite, J. Eur. Ceram. Soc. 27 (2007) 4515-4500.

[5] H Kojimi, Ferromagnetic Materials, vol. 3, in: E.P. Wohlfarth (Ed. ), North Holland, Amsterdam, 1982, p.305.

[6] H.J. Zhang, X. Yao, L.Y. Zhang, The preparation and microwave properties of Ba2ZnxCo2-xFe28O46 hexaferrites, J. Magn. Magn. Mater. 241 (2002) 441-446.

DOI: 10.1016/s0304-8853(01)00447-4

[7] M.W. Pieper, F. Kools, A. Morel, NMR characterization of Co sites in La+Co-doped Sr hexaferrites with enhanced magnetic anisotropy, Phys. Rev. B 65 (2002) 184397.

DOI: 10.1103/physrevb.65.184402

[8] Q.Y. Feng, L. Jen, Microwave properties of ZnTi- substituted M-type barium hexaferrites, IEEE Trans. Magn. 38 (2002) 1391-1394.

DOI: 10.1109/20.996032

[9] P. Wartewig, M.K. Krause, P. Esquinazi, S. Rosler, R. Sonntag, Magnetic properties of Zn- and Ti-substituted barium hexaferrite, J. Magn. Magn. Mater. 192 (1999) 83-99.

DOI: 10.1016/s0304-8853(98)00382-5

[10] V. Babu, P. Padaikathan, Structure and hard magnetic properties of barium hexaferrite with and without La2O3 prepared by ball milling, J. Magn. Magn. Mater. 241 (2002) 85-88.

DOI: 10.1016/s0304-8853(01)00811-3

[11] P. Shi, H. How, X. Zuo, S.D. Yoon, S.A. Oliver, C. Vittoria, MMIC circulators using hexaferrites, IEEE Trans. Magn. 37 (2001) 2389-2391.

DOI: 10.1109/20.951181

[12] M. Nejezchleba, Z. Simsa, K. Zaveta, Magnetic Structure of Hexagonal Ferrites Studied by Mössbauer Spectroscopy, J. Phys. IV 7 (1997) 345.

DOI: 10.1051/jp4:19971139

[13] M. Pal, P. Brahma, B.R. Chakraborty, D. Chakravorty, DC conductivity in barium hexaferrites doped with bismuth oxide, Jpn. J. Appl. Phys. 1 (1997) 2163-2166.

DOI: 10.1143/jjap.36.2163

[14] A.S. Kamzin, V.L. Rozembaum, Mössbauer studies of the surface and bulk magnetic structure of scandium-substituted Ba–M-type hexaferrites, Phys. Solid State 41 (1999) 433-439.

DOI: 10.1134/1.1130797

[15] C. Dube, S. Kashyap, D. Pandya, D. Dube, Dieletric and magnetic properties of Zn-Ti substituted M-type barium hexaferrite, Physics Status Solidi A. 206 (2009) 2627-2631.

DOI: 10.1002/pssa.200925104

[16] N. Yang, H. Jia, J. Pang, Formation and magnetic properties of nanosized PbFe12O19particles synthesized by citrate precursor technique, J. Alloy Compd. 438 (2007) 263-267.

DOI: 10.1016/j.jallcom.2006.08.037

[17] V.V. Soman, V.M. Nanoti, D.K. KulKarni, V.V. Soman, Effect of substitution of Zn-Ti on Magnetic and Dielectric Properties of BaFe12O19, Physics Procedia. 54 (2014) 30-37.

DOI: 10.1016/j.phpro.2014.10.033

[18] M.H. Shams, A.S.H. Rozatian, M.H. Yousefi, J. Valíček, V. Šepelák, Effect of Mg2+ and Ti4+ dopants on the structural, magnetic and high-frequency ferromagnetic properties of barium hexaferrite, J. Magn. Magn. Mater. 399 (2016) 10-18.

DOI: 10.1016/j.jmmm.2015.08.099

[19] S. Kanagesan, S. Jesurani, R. Velmurugan, S. Prabu, T. Kalaivani, Structural and magnetic properties of conventional and microwave treated Ni-Zr doped barium strontium hexaferrite, Mater. Res. Bull. 47 (2012) 188-192.

DOI: 10.1016/j.materresbull.2011.11.053