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Research Article | Open Access

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

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
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Graphical Abstract

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) ferritehydrothermal methodanisotropic exchange coupling interactionHenkel plot

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Journal of Advanced Ceramics
Volume 12 Issue 4,
April 2023
Pages 815-821
DOI: 10.26599/JAC.2023.9220722
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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Received: 23 September 2022
Revised: 30 December 2022
Accepted: 19 January 2023
Published: 13 March 2023
© The Author(s) 2023.

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