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Effects of Mn Substitution on Crystallographic and Magnetic Properties of Li-Zn-Cu Ferrites

  • Lee, Young Bae (Nanotechnology Research Center, Konkuk University) ;
  • Choi, Won-Ok (Department of Nano Science and Mechanical Engineering, Konkuk University) ;
  • Chae, Kwang Pyo (Department of Nano Science and Mechanical Engineering, Konkuk University)
  • Received : 2014.03.16
  • Accepted : 2014.06.23
  • Published : 2014.09.30

Abstract

The effects of manganese substitution on the crystallographic and magnetic properties of Li-Zn-Cu ferrite, $Li_{0.5}Zn_{0.2}Cu_{0.4}Mn_xFe_{2.1-x}O_4$ ($0.0{\leq}x{\leq}0.8$), were investigated. Ferrites were synthesized via a conventional ceramic method. We confirmed the formation of crystallized particles using X-ray diffraction, field emission scanning electron microscopy and $M{\ddot{o}}ssbauer$ spectroscopy. All of the samples showed a single phase with a spinel structure, and the lattice constants linearly decreased as the substituted manganese content increased, and the particle size of the samples also somewhat decreased as the doped manganese content increased. All the $M{\ddot{o}}ssbauer$ spectra can be fitted with two Zeeman sextets, which are the typical spinel ferrite spectra of $Fe^{3+}$ with A- and B-sites, and one doublet. The cation distribution was determined from the variation of the $M{\ddot{o}}ssbauer$ parameters and of the absorption area ratio. The magnetic behavior of the samples showed that an increase in manganese content led to a decrease in the saturation magnetization, whereas the coercivity was nearly constant throughout. The maximum saturation magnetization was 73.35 emu/g at x = 0.0 in $Li_{0.5}Zn_{0.2}Cu_{0.4}Mn_xFe_{2.1-x}O_4$.

Acknowledgement

Supported by : Konkuk University

References

  1. S. A. Jadhav, J. Magn. Magn. Mater. 224, 167 (2001). https://doi.org/10.1016/S0304-8853(00)00580-1
  2. T. Nakamura, T. Miyamoto, and Y. Yamada, J. Magn. Magn. Mater. 256, 340 (2003). https://doi.org/10.1016/S0304-8853(02)00698-4
  3. T. Nakamura, M. Naoe, and Y. Yamada, J. Magn. Magn. Mater. 305, 120 (2006). https://doi.org/10.1016/j.jmmm.2005.11.040
  4. J. K. Kang, W. H. Kwon, J. G. Lee, K. P. Chae, and Y. B. Lee, J. Korean Phys. Soc. 59, 85 (2011). https://doi.org/10.3938/jkps.59.85
  5. C. G. Whinfrey, D. W. Eckort, and A. Tauber, J. Am. Chem. Soc. 82, 2695 (1960). https://doi.org/10.1021/ja01496a010
  6. B. D. Cullity, Elements of X-Ray Diffraction, Addition-Wesley Co. Readings, MA (1978) p. 102.
  7. K. P. Chae, W. H. Kwon, and J. G. Lee, J. Magn. Magn. Mater. 324, 2701 (2012). https://doi.org/10.1016/j.jmmm.2012.03.024
  8. W. H. Kwon, J. G. Lee, S. W. Lee, and K. P. Chae, J. Korean Phys. Soc. 56, 1838 (2010). https://doi.org/10.3938/jkps.56.1838
  9. S. A. Mazen and N. I. Abu-Elsaad, J. Magn. Magn. Mater. 324, 3366 (2012). https://doi.org/10.1016/j.jmmm.2012.05.056
  10. S. A. Jadhav, Mater. Chem. Phys. 65, 120 (2000). https://doi.org/10.1016/S0254-0584(00)00221-2
  11. M. Maisnam, S. Phanjoubam, H. N. K. Sarma, C. Prakash, L. R. Devi, and O. P. Thakur, Materials Lett. 58, 2412 (2004). https://doi.org/10.1016/j.matlet.2004.02.050
  12. L. Neel, Ann. Phys. 3, 137 (1948).
  13. C. P. Bean and J. D. Livingston, J. Appl. Phys. 30, 120S (1959). https://doi.org/10.1063/1.2185850
  14. X. Cao, K. Sun, C. Sun, and L. Leng, J. Magn. Magn. Mater 321, 2896 (2009). https://doi.org/10.1016/j.jmmm.2009.04.049