Maximum energy product of exchange-coupled Sm(FeCo)12/α-Fe nanocomposite particle
The effects of the coating surface orientation of the α-Fe soft magnetic layer on the Sm(Fe0.8Co0.2)12 hard magnetic phase and the volume fraction of α-Fe, VFe, on the maximum energy product, (BH)max of exchange-coupled Sm(Fe0.8Co0.2)12/α-Fe nanocomposite magnet particles were micromagnetics OOMMF p...
| Main Authors: | , , , , , , , |
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| Format: | Article |
| Language: | English |
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AIP Publishing LLC
2023-02-01
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| Series: | AIP Advances |
| Online Access: | http://dx.doi.org/10.1063/9.0000506 |
| _version_ | 1811154848818659328 |
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| author | Ryusei Uda Kunihiro Koike Nobuyuki Inaba Hiroaki Kato Masaru Itakura Susumu Okubo Hitoshi Ohta Hiroki Tsuchiura |
| author_facet | Ryusei Uda Kunihiro Koike Nobuyuki Inaba Hiroaki Kato Masaru Itakura Susumu Okubo Hitoshi Ohta Hiroki Tsuchiura |
| author_sort | Ryusei Uda |
| collection | DOAJ |
| description | The effects of the coating surface orientation of the α-Fe soft magnetic layer on the Sm(Fe0.8Co0.2)12 hard magnetic phase and the volume fraction of α-Fe, VFe, on the maximum energy product, (BH)max of exchange-coupled Sm(Fe0.8Co0.2)12/α-Fe nanocomposite magnet particles were micromagnetics OOMMF package was systematically investigated. The (BH)max of the reference model, Sm(Fe0.8Co0.2)12 particles without Fe layer, was 630 kJ/m3. In contrast, in the nanocomposite magnet particle model with soft magnetic layers on both sides of the hard magnetic phase, (BH)max reached a maximum value of 657 kJ/m3 at VFe = 12% (Fe layer thickness, tFe = 2 nm). In the model with α-Fe coating on the top and bottom surfaces of the hard magnetic phase, (BH)max = 636 kJ/m3 at VFe = 4% (tFe = 2 nm). Furthermore, the coating of the soft magnetic phase on both sides of the hard phase particles reduces the magnitude of the demagnetizing field, Hd of the nanocomposite magnet particles, indicating that the side coating of the soft magnetic phase is effective in increasing (BH)max. These findings allow for a greater degree of freedom in the design of nanocomposite magnets by adjusting not only the VFe volume fraction of the hard/soft phases but also their arrangement. |
| first_indexed | 2024-04-10T04:24:08Z |
| format | Article |
| id | doaj.art-a608f20fad1d4f04ad2040c55a3c8cb0 |
| institution | Directory Open Access Journal |
| issn | 2158-3226 |
| language | English |
| last_indexed | 2024-04-10T04:24:08Z |
| publishDate | 2023-02-01 |
| publisher | AIP Publishing LLC |
| record_format | Article |
| series | AIP Advances |
| spelling | doaj.art-a608f20fad1d4f04ad2040c55a3c8cb02023-03-10T17:26:21ZengAIP Publishing LLCAIP Advances2158-32262023-02-01132025311025311-710.1063/9.0000506Maximum energy product of exchange-coupled Sm(FeCo)12/α-Fe nanocomposite particleRyusei Uda0Kunihiro Koike1Nobuyuki Inaba2Hiroaki Kato3Masaru Itakura4Susumu Okubo5Hitoshi Ohta6Hiroki Tsuchiura7Graduate School of Science and Engineering, Yamagata University, 992-8510 Yonezawa, Yamagata, JapanApplied Mathematics and Physics, Yamagata University, 992-8510 Yonezawa, Yamagata, JapanInformatics and Electronics, Yamagata University, 992-8510 Yonezawa, Yamagata, JapanApplied Mathematics and Physics, Yamagata University, 992-8510 Yonezawa, Yamagata, JapanInterdisciplinary Graduate School of Engineering Sciences, Kyushu University, 816-8580 Kasuga, Fukuoka, JapanMolecular Photoscience Research Center, Kobe University, 657-8501 Kobe, Hyogo, JapanMolecular Photoscience Research Center, Kobe University, 657-8501 Kobe, Hyogo, JapanApplied Physics, Tohoku University, 980-8579 Sendai, Miyagi, JapanThe effects of the coating surface orientation of the α-Fe soft magnetic layer on the Sm(Fe0.8Co0.2)12 hard magnetic phase and the volume fraction of α-Fe, VFe, on the maximum energy product, (BH)max of exchange-coupled Sm(Fe0.8Co0.2)12/α-Fe nanocomposite magnet particles were micromagnetics OOMMF package was systematically investigated. The (BH)max of the reference model, Sm(Fe0.8Co0.2)12 particles without Fe layer, was 630 kJ/m3. In contrast, in the nanocomposite magnet particle model with soft magnetic layers on both sides of the hard magnetic phase, (BH)max reached a maximum value of 657 kJ/m3 at VFe = 12% (Fe layer thickness, tFe = 2 nm). In the model with α-Fe coating on the top and bottom surfaces of the hard magnetic phase, (BH)max = 636 kJ/m3 at VFe = 4% (tFe = 2 nm). Furthermore, the coating of the soft magnetic phase on both sides of the hard phase particles reduces the magnitude of the demagnetizing field, Hd of the nanocomposite magnet particles, indicating that the side coating of the soft magnetic phase is effective in increasing (BH)max. These findings allow for a greater degree of freedom in the design of nanocomposite magnets by adjusting not only the VFe volume fraction of the hard/soft phases but also their arrangement.http://dx.doi.org/10.1063/9.0000506 |
| spellingShingle | Ryusei Uda Kunihiro Koike Nobuyuki Inaba Hiroaki Kato Masaru Itakura Susumu Okubo Hitoshi Ohta Hiroki Tsuchiura Maximum energy product of exchange-coupled Sm(FeCo)12/α-Fe nanocomposite particle AIP Advances |
| title | Maximum energy product of exchange-coupled Sm(FeCo)12/α-Fe nanocomposite particle |
| title_full | Maximum energy product of exchange-coupled Sm(FeCo)12/α-Fe nanocomposite particle |
| title_fullStr | Maximum energy product of exchange-coupled Sm(FeCo)12/α-Fe nanocomposite particle |
| title_full_unstemmed | Maximum energy product of exchange-coupled Sm(FeCo)12/α-Fe nanocomposite particle |
| title_short | Maximum energy product of exchange-coupled Sm(FeCo)12/α-Fe nanocomposite particle |
| title_sort | maximum energy product of exchange coupled sm feco 12 α fe nanocomposite particle |
| url | http://dx.doi.org/10.1063/9.0000506 |
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