Synthesis of Sandwiched Composite Nanomagnets by Epitaxial Growth of Fe3O4 Layers on Srfe12o19 Nanoplates in High-Boiling Organic Solvent

Evgeny O. Anokhin; Danila A. Deyankov; Zitian Xia; Ekaterina S. Kozlyakova; Vasily A. Lebedev; Anatolii V. Morozov; Daniil A. Kozlov; Roy R. Nigaard; Dmitry I. Petukhov; Lev A. Trusov

doi:10.20944/preprints202211.0394.v1

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preprints.org > chemistry and materials science > nanotechnology > doi: 10.20944/preprints202211.0394.v1

Preprint Article Version 1 Preserved in Portico This version is not peer-reviewed

Synthesis of Sandwiched Composite Nanomagnets by Epitaxial Growth of Fe₃O₄Layers on Srfe₁₂o₁₉ Nanoplates in High-Boiling Organic Solvent

Evgeny O. Anokhin

^* ,

Danila A. Deyankov

Zitian Xia

Ekaterina S. Kozlyakova

Version 1 : Received: 19 November 2022 / Approved: 22 November 2022 / Online: 22 November 2022 (02:29:40 CET)
Version 2 : Received: 14 December 2022 / Approved: 15 December 2022 / Online: 15 December 2022 (07:03:38 CET)

A peer-reviewed article of this Preprint also exists.

Anokhin, E.O.; Deyankov, D.A.; Xia, Z.; Kozlyakova, E.S.; Lebedev, V.A.; Morozov, A.V.; Kozlov, D.A.; Nygaard, R.R.; Petukhov, D.I.; Trusov, L.A. Synthesis of Sandwiched Composite Nanomagnets by Epitaxial Growth of Fe₃O₄ Layers on SrFe₁₀Cr₂O₁₉ Nanoplates in High-Boiling Organic Solvent. Nanomaterials 2023, 13, 167. Anokhin, E.O.; Deyankov, D.A.; Xia, Z.; Kozlyakova, E.S.; Lebedev, V.A.; Morozov, A.V.; Kozlov, D.A.; Nygaard, R.R.; Petukhov, D.I.; Trusov, L.A. Synthesis of Sandwiched Composite Nanomagnets by Epitaxial Growth of Fe3O4 Layers on SrFe10Cr2O19 Nanoplates in High-Boiling Organic Solvent. Nanomaterials 2023, 13, 167.

Abstract

Herein, we demonstrate the synthesis of sandwiched composite nanomagnets, which consist of hard magnetic hexaferrite cores and magnetite outer layers. The hexaferrite plate-like nanoparticles with average dimensions of 16.0 nm × 4.9 nm were prepared by glass crystallization method and were covered by spinel-type iron oxide via thermal decomposition of iron acetylacetonate in hexadecane solution. The hexaferrite nanoplates act as seeds for the epitaxial growth of the magnetite, which results in uniform continuous outer layers on both sides. The thickness of the layers can be adjusted by controlling the concentration of metal ions. In this way, layers with average thickness of 3.9 and 5.0 nm were obtained. Due to an atomically smooth interface the magnetic composites demonstrate the exchange coupling effect acting as single phases during remagnetization. The developed approach can be applied to any spinel-type material with matching lattice parameters and opens the way to expanding the performance of hexaferrite nanomagnets due to a combination of various functional properties.

Keywords

permanent magnets; hexaferrites; magnetic nanocomposites; nanomagnets; epitaxy; exchange coupling; shape anisotropy

Subject

Chemistry and Materials Science, Nanotechnology

Copyright: This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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