Structure and magnetic properties of nanocompsite Fe–Pt–B ternary alloys
Structures and magnetic properties of nanocompsite Fe–Pt–B ternary alloys were investigated in a widely compositional range. A single amorphous phase was formed in a composition range of 0–15 at. % Pt and 20–30 at. % B, while the ranges of fcc-FePt + amorphous, fcc-FePt + Fe2B and L10-FePt + Fe2B/Fe...
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Elsevier
2025-05-01
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| Series: | Journal of Materials Research and Technology |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2238785425012888 |
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| author | Dianguo Ma Liantao Cheng Yanli Zhu Yanhui Li Yingmin Wang Kunio Yubuta Wei Zhang Lincai Zhang |
| author_facet | Dianguo Ma Liantao Cheng Yanli Zhu Yanhui Li Yingmin Wang Kunio Yubuta Wei Zhang Lincai Zhang |
| author_sort | Dianguo Ma |
| collection | DOAJ |
| description | Structures and magnetic properties of nanocompsite Fe–Pt–B ternary alloys were investigated in a widely compositional range. A single amorphous phase was formed in a composition range of 0–15 at. % Pt and 20–30 at. % B, while the ranges of fcc-FePt + amorphous, fcc-FePt + Fe2B and L10-FePt + Fe2B/FeB phases were formed out the range of single amorphous. With more than 5 at. % of Pt, the crystallized structure was obtained consisting of nanoscale L10-FePt and Fe2B/FeB phases after annealing except for alloys with 0–10 at. % Pt and 15–25 at. % B. The annealed alloys with ≥10 at. % of Pt exhibit good hard magnetic properties. Increasing the contents of Pt and B were propitious to increase the coercivity (iHc) of the alloys owing to the enlargement of volume fraction for L10-FePt phase. The maximum value of iHc can reach 806 kA/m for the Fe50Pt25B25 alloy after annealing at 843 K for 900 s. Higher Pt content (>20 at. %) led to a decrease of the iHc for alloys with more than 30 at. % B, which is due to the weakened exchange coupling between soft and hard magnetic phases in nanocomposite magnets as the precipitation of FeB phase. |
| format | Article |
| id | doaj-art-73e3d53949f04d4dbacd131dcd4f64a1 |
| institution | OA Journals |
| issn | 2238-7854 |
| language | English |
| publishDate | 2025-05-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Journal of Materials Research and Technology |
| spelling | doaj-art-73e3d53949f04d4dbacd131dcd4f64a12025-08-20T02:26:09ZengElsevierJournal of Materials Research and Technology2238-78542025-05-01368935894110.1016/j.jmrt.2025.05.133Structure and magnetic properties of nanocompsite Fe–Pt–B ternary alloysDianguo Ma0Liantao Cheng1Yanli Zhu2Yanhui Li3Yingmin Wang4Kunio Yubuta5Wei Zhang6Lincai Zhang7School of Opto-Electronic Engineering, Zaozhuang University, Zaozhuang, 277160, ChinaSchool of Opto-Electronic Engineering, Zaozhuang University, Zaozhuang, 277160, ChinaSchool of Opto-Electronic Engineering, Zaozhuang University, Zaozhuang, 277160, ChinaSchool of Materials Science and Engineering, Dalian University of Technology, Dalian, 116024, ChinaSchool of Materials Science and Engineering, Dalian University of Technology, Dalian, 116024, ChinaFaculty of Engineering, Shinshu University, Nagano, 380-8553, JapanSchool of Materials Science and Engineering, Dalian University of Technology, Dalian, 116024, China; Corresponding author.School of Opto-Electronic Engineering, Zaozhuang University, Zaozhuang, 277160, China; Corresponding author.Structures and magnetic properties of nanocompsite Fe–Pt–B ternary alloys were investigated in a widely compositional range. A single amorphous phase was formed in a composition range of 0–15 at. % Pt and 20–30 at. % B, while the ranges of fcc-FePt + amorphous, fcc-FePt + Fe2B and L10-FePt + Fe2B/FeB phases were formed out the range of single amorphous. With more than 5 at. % of Pt, the crystallized structure was obtained consisting of nanoscale L10-FePt and Fe2B/FeB phases after annealing except for alloys with 0–10 at. % Pt and 15–25 at. % B. The annealed alloys with ≥10 at. % of Pt exhibit good hard magnetic properties. Increasing the contents of Pt and B were propitious to increase the coercivity (iHc) of the alloys owing to the enlargement of volume fraction for L10-FePt phase. The maximum value of iHc can reach 806 kA/m for the Fe50Pt25B25 alloy after annealing at 843 K for 900 s. Higher Pt content (>20 at. %) led to a decrease of the iHc for alloys with more than 30 at. % B, which is due to the weakened exchange coupling between soft and hard magnetic phases in nanocomposite magnets as the precipitation of FeB phase.http://www.sciencedirect.com/science/article/pii/S2238785425012888Nanocompsite magnetsMelt-spinningAmorphousL10-FePt phaseCoercivity |
| spellingShingle | Dianguo Ma Liantao Cheng Yanli Zhu Yanhui Li Yingmin Wang Kunio Yubuta Wei Zhang Lincai Zhang Structure and magnetic properties of nanocompsite Fe–Pt–B ternary alloys Journal of Materials Research and Technology Nanocompsite magnets Melt-spinning Amorphous L10-FePt phase Coercivity |
| title | Structure and magnetic properties of nanocompsite Fe–Pt–B ternary alloys |
| title_full | Structure and magnetic properties of nanocompsite Fe–Pt–B ternary alloys |
| title_fullStr | Structure and magnetic properties of nanocompsite Fe–Pt–B ternary alloys |
| title_full_unstemmed | Structure and magnetic properties of nanocompsite Fe–Pt–B ternary alloys |
| title_short | Structure and magnetic properties of nanocompsite Fe–Pt–B ternary alloys |
| title_sort | structure and magnetic properties of nanocompsite fe pt b ternary alloys |
| topic | Nanocompsite magnets Melt-spinning Amorphous L10-FePt phase Coercivity |
| url | http://www.sciencedirect.com/science/article/pii/S2238785425012888 |
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