Correlation between Microstructure and Magnetism in Ball-Milled SmCo<sub>5</sub>/α-Fe (5%wt. α-Fe) Nanocomposite Magnets
Magnetic nanocomposites SmCo<sub>5</sub>/α-Fe were synthesized mechanically by high-energy ball milling (HEBM) from SmCo<sub>5</sub> and 5%wt. of α-Fe powders. The X-ray diffraction analysis reveals the hexagonal 1:5 phase as the main one accompanied by the cubic α-Fe phase a...
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MDPI AG
2021-02-01
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| Online Access: | https://www.mdpi.com/1996-1944/14/4/805 |
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| author | Anna Bajorek Paweł Łopadczak Krystian Prusik Maciej Zubko |
| author_facet | Anna Bajorek Paweł Łopadczak Krystian Prusik Maciej Zubko |
| author_sort | Anna Bajorek |
| collection | DOAJ |
| description | Magnetic nanocomposites SmCo<sub>5</sub>/α-Fe were synthesized mechanically by high-energy ball milling (HEBM) from SmCo<sub>5</sub> and 5%wt. of α-Fe powders. The X-ray diffraction analysis reveals the hexagonal 1:5 phase as the main one accompanied by the cubic α-Fe phase and 2:17 rhombohedral as the secondary phase. The content of each detected phase is modified throughout the synthesis duration. A significant decrease in crystallite size with a simultaneous increase in lattice straining is observed. A simultaneous gradual reduction in particle size is noted from the microstructural analysis. Magnetic properties reveal non-linear modification of magnetic parameters associated with the strength of the exchange coupling induced by various duration times of mechanical synthesis. The highest value of the maximum energy product <i>(BH)<sub>max</sub></i> at room temperature is estimated for samples milled for 1 and 6 h. The intermediate mixed-valence state of Sm ions is confirmed by electronic structure analysis. An increase in the Co magnetic moment versus the milling time is evidenced based on the performed fitting of the Co3<i>s</i> core level lines. |
| first_indexed | 2024-03-09T05:05:53Z |
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| id | doaj.art-49c7c6618a6148bdbbb3a32d0b33ad15 |
| institution | Directory Open Access Journal |
| issn | 1996-1944 |
| language | English |
| last_indexed | 2024-03-09T05:05:53Z |
| publishDate | 2021-02-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Materials |
| spelling | doaj.art-49c7c6618a6148bdbbb3a32d0b33ad152023-12-03T12:54:33ZengMDPI AGMaterials1996-19442021-02-0114480510.3390/ma14040805Correlation between Microstructure and Magnetism in Ball-Milled SmCo<sub>5</sub>/α-Fe (5%wt. α-Fe) Nanocomposite MagnetsAnna Bajorek0Paweł Łopadczak1Krystian Prusik2Maciej Zubko3A. Chełkowski Institute of Physics, University of Silesia in Katowice, 75 Pułku Piechoty 1, 41-500 Chorzów, PolandA. Chełkowski Institute of Physics, University of Silesia in Katowice, 75 Pułku Piechoty 1, 41-500 Chorzów, PolandSilesian Center for Education and Interdisciplinary Research, University of Silesia in Katowice, 75 Pułku Piechoty 1A, 41-500 Chorzów, PolandSilesian Center for Education and Interdisciplinary Research, University of Silesia in Katowice, 75 Pułku Piechoty 1A, 41-500 Chorzów, PolandMagnetic nanocomposites SmCo<sub>5</sub>/α-Fe were synthesized mechanically by high-energy ball milling (HEBM) from SmCo<sub>5</sub> and 5%wt. of α-Fe powders. The X-ray diffraction analysis reveals the hexagonal 1:5 phase as the main one accompanied by the cubic α-Fe phase and 2:17 rhombohedral as the secondary phase. The content of each detected phase is modified throughout the synthesis duration. A significant decrease in crystallite size with a simultaneous increase in lattice straining is observed. A simultaneous gradual reduction in particle size is noted from the microstructural analysis. Magnetic properties reveal non-linear modification of magnetic parameters associated with the strength of the exchange coupling induced by various duration times of mechanical synthesis. The highest value of the maximum energy product <i>(BH)<sub>max</sub></i> at room temperature is estimated for samples milled for 1 and 6 h. The intermediate mixed-valence state of Sm ions is confirmed by electronic structure analysis. An increase in the Co magnetic moment versus the milling time is evidenced based on the performed fitting of the Co3<i>s</i> core level lines.https://www.mdpi.com/1996-1944/14/4/805rare-earth intermetallicshigh-energy ball millingsoft/hard magnetic nanocompositespermanent magnetsmicrostructuremagnetic properties |
| spellingShingle | Anna Bajorek Paweł Łopadczak Krystian Prusik Maciej Zubko Correlation between Microstructure and Magnetism in Ball-Milled SmCo<sub>5</sub>/α-Fe (5%wt. α-Fe) Nanocomposite Magnets Materials rare-earth intermetallics high-energy ball milling soft/hard magnetic nanocomposites permanent magnets microstructure magnetic properties |
| title | Correlation between Microstructure and Magnetism in Ball-Milled SmCo<sub>5</sub>/α-Fe (5%wt. α-Fe) Nanocomposite Magnets |
| title_full | Correlation between Microstructure and Magnetism in Ball-Milled SmCo<sub>5</sub>/α-Fe (5%wt. α-Fe) Nanocomposite Magnets |
| title_fullStr | Correlation between Microstructure and Magnetism in Ball-Milled SmCo<sub>5</sub>/α-Fe (5%wt. α-Fe) Nanocomposite Magnets |
| title_full_unstemmed | Correlation between Microstructure and Magnetism in Ball-Milled SmCo<sub>5</sub>/α-Fe (5%wt. α-Fe) Nanocomposite Magnets |
| title_short | Correlation between Microstructure and Magnetism in Ball-Milled SmCo<sub>5</sub>/α-Fe (5%wt. α-Fe) Nanocomposite Magnets |
| title_sort | correlation between microstructure and magnetism in ball milled smco sub 5 sub α fe 5 wt α fe nanocomposite magnets |
| topic | rare-earth intermetallics high-energy ball milling soft/hard magnetic nanocomposites permanent magnets microstructure magnetic properties |
| url | https://www.mdpi.com/1996-1944/14/4/805 |
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