A Study on Synthesis and Exchange- Spring Properties of the SrFe12O19/Fe3O4 Nanocomposites with Core-Shell Structure
Main Article Content
Abstract
Two series of $SrFe_{12}O_{19}/Fe_{3}O_{4}$ nanocomposites were prepared using mechanical mixing method from $SrFe_{12}O_{19}$ and Fe3O4 nano powders and sol-gel method combined with hydrothermal method. [cite: 2] The phase composition, surface morphology and magnetic properties of these samples were investigated using XRD, SEM, Raman and VSM. [cite: 3] The stepped hysteresis loops of all the samples indicated that two magnetic phases are co-existed. [cite: 4] Findings show that the samples prepared by using sol-gel method combine with hydrothermal method comprise two phases and $Fe_{3}O_{4}$ particles are coated on the surface of SrFe12019 particles. [cite: 5] The saturation magnetization reaches 63.735 emu/g for CS 950. [cite: 6]
Keywords
nanocomposite, core- shell, exchange-spring
Article Details
References
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[9] Y. Lin, Y. Liu, J. Dai, L. Wang, and H. Yang, Synthesis and microwave absorption properties of plate-like BaFe12019@Fe3O4 core-shell composite, J. Alloys Compd., vol. 739, pp. 202-210, 2018.
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[2] J. Bursik, Z. Simsa, L. Stichauer, and R. Tesar, Magneto-optical properties of Co- and Ti-substituted hexagonal ferrite films prepared by the sol-gel method, J. Magn. Magn. Mater., vol. 157-158, pp. 311-312, 1996.
[3] C. C. Yang, Y. J. Gung, C. C. Shih, W. C. Hung, and K. H. Wu, Synthesis, infrared and microwave absorbing properties of (BaFe12O19/BaTiO3)/polyaniline composite, J. Magn. Magn. Mater., vol. 323, no. 7, pp. 933-938, 2011.
[4] M. Chithra, C. N. Anumol, B. Sahu, and S. C. Sahoo, Exchange spring like magnetic behavior in cobalt ferrite nanoparticles, J. Magn. Magn. Mater., vol. 401, pp. 1-8, 2016.
[5] K. W. Moon, S. G. Cho, Y. H. Choa, K. H. Kim, and J. Kim, Synthesis and magnetic properties of nano Ba-hexaferrite/NiZn ferrite composites, Phys. Status Solidi Appl. Mater. Sci., vol. 204, no. 12, pp. 4141-4144, 2007.
[6] H. Yang, M. Liu, Y. Lin, and Y. Yang, Simultaneous enhancements of remanence and (BH)max in $BaFe_{12}O_{19}/CoFe_{2}O_{4}$ nanocomposite powders, J. Alloys Compd., vol. 631, pp. 335-339, 2015.
[7] K. P. Remya, D. Prabhu, S. Amirthapandian, C. Viswanathan, and N. Ponpandian, Exchange spring magnetic behavior in $BaFe_{12}O_{19}/Fe_{3}O$ nanocomposites, J. Magn. Magn. Mater., vol. 406, pp. 233-238, 2016.
[8] L. Zhang and Z. Li, Synthesis and characterization of SrFe12019/CoFe2O4 nanocomposites with core-shell structure, J. Alloys Compd., vol. 469, no. 1-2, pp. 422-426, 2009.
[9] Y. Lin, Y. Liu, J. Dai, L. Wang, and H. Yang, Synthesis and microwave absorption properties of plate-like BaFe12019@Fe3O4 core-shell composite, J. Alloys Compd., vol. 739, pp. 202-210, 2018.
[10] H. Zeng, S. Sun, J. Li, Z. L. Wang, and J. P. Liu, Tailoring magnetic properties of core/shell nanoparticles, Appl. Phys. Lett., vol. 85, no. 5, pp. 792-794, 2004.