Synthesis of Sandwiched Composite Nanomagnets by Epitaxial Growth of Fe<sub>3</sub>O<sub>4</sub> Layers on SrFe<sub>10</sub>Cr<sub>2</sub>O<sub>19</sub> Nanoplates in High-Boiling Organic Solvent
Herein, we demonstrate the synthesis of sandwiched composite nanomagnets, which consist of hard magnetic Cr-substituted hexaferrite cores and magnetite outer layers. The hexaferrite plate-like nanoparticles, with average dimensions of 36.3 nm × 5.2 nm, were prepared via a glass crystallization metho...
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MDPI AG
2022-12-01
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| Series: | Nanomaterials |
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| Online Access: | https://www.mdpi.com/2079-4991/13/1/167 |
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| author | Evgeny O. Anokhin Danila A. Deyankov Zitian Xia Ekaterina S. Kozlyakova Vasily A. Lebedev Anatolii V. Morozov Daniil A. Kozlov Roy R. Nygaard Dmitry I. Petukhov Lev A. Trusov |
| author_facet | Evgeny O. Anokhin Danila A. Deyankov Zitian Xia Ekaterina S. Kozlyakova Vasily A. Lebedev Anatolii V. Morozov Daniil A. Kozlov Roy R. Nygaard Dmitry I. Petukhov Lev A. Trusov |
| author_sort | Evgeny O. Anokhin |
| collection | DOAJ |
| description | Herein, we demonstrate the synthesis of sandwiched composite nanomagnets, which consist of hard magnetic Cr-substituted hexaferrite cores and magnetite outer layers. The hexaferrite plate-like nanoparticles, with average dimensions of 36.3 nm × 5.2 nm, were prepared via a glass crystallization method and were covered by spinel-type iron oxide via thermal decomposition of iron acetylacetonate in a 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 an average thickness of 3.7 and 4.9 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 expand the performance of hexaferrite nanomagnets due to a combination of various functional properties. |
| first_indexed | 2024-03-09T12:04:45Z |
| format | Article |
| id | doaj.art-7697ef245f7e4375a8df593a63154e70 |
| institution | Directory Open Access Journal |
| issn | 2079-4991 |
| language | English |
| last_indexed | 2024-03-09T12:04:45Z |
| publishDate | 2022-12-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Nanomaterials |
| spelling | doaj.art-7697ef245f7e4375a8df593a63154e702023-11-30T22:59:41ZengMDPI AGNanomaterials2079-49912022-12-0113116710.3390/nano13010167Synthesis of Sandwiched Composite Nanomagnets by Epitaxial Growth of Fe<sub>3</sub>O<sub>4</sub> Layers on SrFe<sub>10</sub>Cr<sub>2</sub>O<sub>19</sub> Nanoplates in High-Boiling Organic SolventEvgeny O. Anokhin0Danila A. Deyankov1Zitian Xia2Ekaterina S. Kozlyakova3Vasily A. Lebedev4Anatolii V. Morozov5Daniil A. Kozlov6Roy R. Nygaard7Dmitry I. Petukhov8Lev A. Trusov9Faculty of Chemistry, Lomonosov Moscow State University, Moscow 119991, RussiaFaculty of Chemistry, Lomonosov Moscow State University, Moscow 119991, RussiaFaculty of Materials Science, Lomonosov Moscow State University, Moscow 119991, RussiaFaculty of Physics, Lomonosov Moscow State University, Moscow 119991, RussiaBernal Institute, University of Limerick, Limerick V94 T9PX, IrelandSkolkovo Institute of Science and Technology, Moscow 121205, RussiaKurnakov Institute of General and Inorganic Chemistry of the Russian Academy of Sciences, Moscow 119991, RussiaFaculty of Chemistry, Lomonosov Moscow State University, Moscow 119991, RussiaFaculty of Chemistry, Lomonosov Moscow State University, Moscow 119991, RussiaFaculty of Chemistry, Lomonosov Moscow State University, Moscow 119991, RussiaHerein, we demonstrate the synthesis of sandwiched composite nanomagnets, which consist of hard magnetic Cr-substituted hexaferrite cores and magnetite outer layers. The hexaferrite plate-like nanoparticles, with average dimensions of 36.3 nm × 5.2 nm, were prepared via a glass crystallization method and were covered by spinel-type iron oxide via thermal decomposition of iron acetylacetonate in a 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 an average thickness of 3.7 and 4.9 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 expand the performance of hexaferrite nanomagnets due to a combination of various functional properties.https://www.mdpi.com/2079-4991/13/1/167permanent magnetshexaferritesmagnetic nanocompositesnanomagnetsepitaxyexchange coupling |
| spellingShingle | Evgeny O. Anokhin Danila A. Deyankov Zitian Xia Ekaterina S. Kozlyakova Vasily A. Lebedev Anatolii V. Morozov Daniil A. Kozlov Roy R. Nygaard Dmitry I. Petukhov Lev A. Trusov Synthesis of Sandwiched Composite Nanomagnets by Epitaxial Growth of Fe<sub>3</sub>O<sub>4</sub> Layers on SrFe<sub>10</sub>Cr<sub>2</sub>O<sub>19</sub> Nanoplates in High-Boiling Organic Solvent Nanomaterials permanent magnets hexaferrites magnetic nanocomposites nanomagnets epitaxy exchange coupling |
| title | Synthesis of Sandwiched Composite Nanomagnets by Epitaxial Growth of Fe<sub>3</sub>O<sub>4</sub> Layers on SrFe<sub>10</sub>Cr<sub>2</sub>O<sub>19</sub> Nanoplates in High-Boiling Organic Solvent |
| title_full | Synthesis of Sandwiched Composite Nanomagnets by Epitaxial Growth of Fe<sub>3</sub>O<sub>4</sub> Layers on SrFe<sub>10</sub>Cr<sub>2</sub>O<sub>19</sub> Nanoplates in High-Boiling Organic Solvent |
| title_fullStr | Synthesis of Sandwiched Composite Nanomagnets by Epitaxial Growth of Fe<sub>3</sub>O<sub>4</sub> Layers on SrFe<sub>10</sub>Cr<sub>2</sub>O<sub>19</sub> Nanoplates in High-Boiling Organic Solvent |
| title_full_unstemmed | Synthesis of Sandwiched Composite Nanomagnets by Epitaxial Growth of Fe<sub>3</sub>O<sub>4</sub> Layers on SrFe<sub>10</sub>Cr<sub>2</sub>O<sub>19</sub> Nanoplates in High-Boiling Organic Solvent |
| title_short | Synthesis of Sandwiched Composite Nanomagnets by Epitaxial Growth of Fe<sub>3</sub>O<sub>4</sub> Layers on SrFe<sub>10</sub>Cr<sub>2</sub>O<sub>19</sub> Nanoplates in High-Boiling Organic Solvent |
| title_sort | synthesis of sandwiched composite nanomagnets by epitaxial growth of fe sub 3 sub o sub 4 sub layers on srfe sub 10 sub cr sub 2 sub o sub 19 sub nanoplates in high boiling organic solvent |
| topic | permanent magnets hexaferrites magnetic nanocomposites nanomagnets epitaxy exchange coupling |
| url | https://www.mdpi.com/2079-4991/13/1/167 |
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