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Research Article | Open Access

Anisotropic exchange coupling interaction between hard–hard magnetic grains in sintered SrFe12O19 ferrites

Shuang ZhangaChunxiang CaobShubing SucAilin Xiaa( )Huiyan ZhangaHailing LiaZhiyuan LiuaChuangui Jina
School of Materials Science and Engineering, Anhui University of Technology, Maanshan 243002, China
Analysis and Testing Central Facility, Anhui University of Technology, Maanshan 243002, China
School of Electronic and Information Engineering, Ningbo University of Technology, Ningbo 315016, China
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Graphical Abstract


Exchange coupling interaction in sintered magnetic materials is generally isotropic. In this study, the anisotropic exchange coupling interaction was found in sintered oblate cylindrical SrFe12O19 (SrM) specimens obtained by the SrM nanopowders synthesized via a hydrothermal method. According to Henkel plots, the exchange coupling interaction between hard–hard magnetic grains was found in both as-pressed and sintered specimens. However, the exchange coupling interaction can only be found in the in-plane direction but not in the out-of-plane direction for the sintered specimens. By building a model of a grain configuration, this anisotropy of the exchange coupling interaction was ascribed to the vertically arranged plate-like SrM grains with micrometers in width but nanometers in thickness, which was confirmed by morphologies of cross sections in fractured specimens.


Wang FY, Ji JJ, Cao CX, et al. A facile route to prepare porous M-type SrFe12O19 ferrites assisted by using carbon spheres: Structural and magnetic properties. J Phys Chem Solids 2022, 163: 110565.
Skomski R, Coey JMD. Giant energy product in nanostructured two-phase magnets. Phys Rev B 1993, 48: 15812–15816.
Almessiere MA, Slimani Y, Algarou NA, et al. Tuning the structure, magnetic, and high frequency properties of Sc-doped Sr0.5Ba0.5ScxFe12−xO19/NiFe2O4 hard/soft nanocomposites. Adv Electron Mater 2022, 8: 2101124.
Gao RW, Feng WC, Liu HQ, et al. Exchange-coupling interaction, effective anisotropy and coercivity in nanocomposite permanent materials. J Appl Phys 2003, 94: 664–668.
McKinnon T, Girt E. Exchange coupling in FeCoB/Ru, Mo/FeCoB trilayer structures. Appl Phys Lett 2018, 113: 192407.
Schrefl T, Fidler J, Kronmüller H. Remanence and coercivity in isotropic nanocrystalline permanent magnets. Phys Rev B 1994, 49: 6100–6110.
Xia AL, Zuo CH, Zhang LJ, et al. Magnetic properties, exchange coupling and novel stripe domains in bulk SrFe12O19/(Ni,Zn)Fe2O4 composites. J Phys D Appl Phys 2014, 47: 415004.
Li ZB, Zhang M, Shen BG, et al. Non-uniform magnetization reversal in nanocomposite magnets. Appl Phys Lett 2013, 102: 102405.
Kelly PE, O’Grady K, Mayo PI, et al. Switching mechanisms in cobalt–phosphorus thin films. IEEE T Magn 1989, 25: 3881–3883.
Chauhan CC, Gupta T, Meena SS, et al. Tailoring magnetic and dielectric properties of SrFe12O19/NiFe2O4 ferrite nanocomposites synthesized in presence of calotropis gigantea (crown) flower extract. J Alloys Compd 2022, 900: 163415.
Alipour A, Torkian S, Ghasemi A, et al. Magnetic properties improvement through exchange-coupling in hard/soft SrFe12O19/Co nanocomposite. Ceram Int 2021, 47: 2463–2470.
Sun Y, Gao RW, Han GB, et al. Effect of exchange-coupling interaction on anisotropy of grain in nanoscaled magnets. Solid State Commun 2007, 141: 156–159.
Xia AL, Zuo CH, Chen L, et al. Hexagonal SrFe12O19 ferrites: Hydrothermal synthesis and their sintering properties. J Magn Magn Mater 2013, 332: 186–191.
Xia AL, Hu XZ, Li DK, et al. Hydrothermal hexagonal SrFe12O19 ferrite powders: Phase composition, microstructure and acid washing. Electron Mater Lett 2014, 10: 423–426.
Izumi F, Ikeda T. A Rietveld-analysis programm RIETAN-98 and its applications to zeolites. Mater Sci Forum 2000, 321–324: 198–205.
Lim ES, Mun KR, Kang YM. Effect of Bi2O3, MnCO3 additives on the structure and magnetic properties of M-type Sr-hexaferrites. J Magn Magn Mater 2018, 464: 26–30.
Liu CC, Liu XS, Feng SJ, et al. Effect of Y–La–Co substitution on microstructure and magnetic properties of M-type strontium hexagonal ferrites prepared by ceramic method. J Magn Magn Mater 2018, 445: 1–5.
Kimura K, Ohgaki M, Tanaka K, et al. Study of the bipyramidal site in magnetoplumbite-like compounds, SrM12O19 (M = Al, Fe, Ga). J Solid State Chem 1990, 87: 186–194.
Xia AL, Zhan T, Sun R, et al. M-type SrFe12O19 ferrites obtained by using cubic or spindle-like α-Fe2O3 as Fe sources: A comparative study. J Alloys Compd 2019, 784: 276–281.
Zhang WR, Jian J, Chen AP, et al. Strain relaxation and enhanced perpendicular magnetic anisotropy in BiFeO3:CoFe2O4 vertically aligned nanocomposite thin films. Appl Phys Lett 2014, 104: 062402.
Carcia PF, Meinhaldt AD, Suna A. Perpendicular magnetic anisotropy in Pd/Co thin film layered structures. Appl Phys Lett 1985, 47: 178–180.
Eikeland AZ, Hölscher J, Christensen M. Hydrothermal synthesis of SrFe12O19 nanoparticles: Effect of the choice of base and base concentration. J Phys D Appl Phys 2021, 54: 134004.
Herzer G. Grain size dependence of coercivity and permeability in nanocrystalline ferromagnets. IEEE T Magn 1990, 26: 1397–1402.
Xia AL, Ren SZ, Lin JS, et al. Magnetic properties of sintered SrFe12O19–CoFe2O4 nanocomposites with exchange coupling. J Alloys Compd 2015, 653: 108–116.
Journal of Advanced Ceramics
Pages 815-821
Cite this article:
Zhang S, Cao C, Su S, et al. Anisotropic exchange coupling interaction between hard–hard magnetic grains in sintered SrFe12O19 ferrites. Journal of Advanced Ceramics, 2023, 12(4): 815-821.








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Received: 23 September 2022
Revised: 30 December 2022
Accepted: 19 January 2023
Published: 13 March 2023
© The Author(s) 2023.

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