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Journal of Advanced Ceramics 2023, 12(4): 815-821 https://doi.org/10.26599/JAC.2023.9220722
Research Article | Open Access | Issue | Published: 13 March 2023

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

Show Author's Information Shuang Zhanga,  Chunxiang Caob,  Shubing Suc,  Ailin Xiaa( ),  Huiyan Zhanga,  Hailing Lia,  Zhiyuan Liua,  Chuangui 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
Keywords:
SrFe12O19 (SrM) ferrite, hydrothermal method, anisotropic exchange coupling interaction, Henkel plot
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. https://doi.org/10.26599/JAC.2023.9220722
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Abstract Full text About this article

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.


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

Show Author's information Shuang Zhanga, Chunxiang Caob, Shubing Suc, Ailin Xiaa( ), Huiyan Zhanga, Hailing Lia, Zhiyuan Liua, Chuangui 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

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.

Keywords: SrFe12O19 (SrM) ferrite, hydrothermal method, anisotropic exchange coupling interaction, Henkel plot

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Publication history
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Publication history

Received: 23 September 2022
Revised: 30 December 2022
Accepted: 19 January 2023
Published: 13 March 2023
Issue date: April 2023

Copyright

© The Author(s) 2023.

Acknowledgements

We thank for Prof. Qing’an Zhang and his Ph.D. student Cong Peng for the help of the Rietveld refinement. This study was supported by the National Natural Science Foundation of China (Grant No. 51772004).

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