Phase-Field Study of Exchange Coupling in Co-Pt Nonstandard Nanochessboards
The Co-Pt binary system can form a two-phase nanochessboard structure comprising regularly aligned nanorods of magnetically hard tetragonal L1<sub>0</sub> phase and magnetically soft cubic L1<sub>2</sub> phase. This Co-Pt nanochessboard, being an exchange-coupled magnetic nan...
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MDPI AG
2023-08-01
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| Online Access: | https://www.mdpi.com/1996-1944/16/16/5689 |
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| author | Keran Xu Jiabei Tang Yanzhe Wang Yinning Zhu Liwei D. Geng |
| author_facet | Keran Xu Jiabei Tang Yanzhe Wang Yinning Zhu Liwei D. Geng |
| author_sort | Keran Xu |
| collection | DOAJ |
| description | The Co-Pt binary system can form a two-phase nanochessboard structure comprising regularly aligned nanorods of magnetically hard tetragonal L1<sub>0</sub> phase and magnetically soft cubic L1<sub>2</sub> phase. This Co-Pt nanochessboard, being an exchange-coupled magnetic nanocomposite, exhibits a strong effect on magnetic domains and coercivity. While the ideal nanochessboard structure has tiles with equal edge lengths (a = b), the non-ideal or nonstandard nanochessboard structure has tiles with unequal edge lengths (a ≠ b). In this study, we employed phase-field modeling and computer simulation to systematically investigate the exchange coupling effect on magnetic properties in nonstandard nanochessboards. The simulations reveal that coercivity is dependent on the length scale, with magnetic hardening occurring below the critical exchange length, followed by magnetic softening above the critical exchange length, similar to the standard nanochessboards. Moreover, the presence of unequal edge lengths induces an anisotropic exchange coupling and shifts the coercivity peak with the length scale. |
| first_indexed | 2024-03-10T23:46:21Z |
| format | Article |
| id | doaj.art-38d725a9059140439f55d18703310f4a |
| institution | Directory Open Access Journal |
| issn | 1996-1944 |
| language | English |
| last_indexed | 2024-03-10T23:46:21Z |
| publishDate | 2023-08-01 |
| publisher | MDPI AG |
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| series | Materials |
| spelling | doaj.art-38d725a9059140439f55d18703310f4a2023-11-19T02:01:20ZengMDPI AGMaterials1996-19442023-08-011616568910.3390/ma16165689Phase-Field Study of Exchange Coupling in Co-Pt Nonstandard NanochessboardsKeran Xu0Jiabei Tang1Yanzhe Wang2Yinning Zhu3Liwei D. Geng4Department of Materials Science and Engineering, Sichuan University-Pittsburgh Institute, Sichuan University, Chengdu 610065, ChinaDepartment of Materials Science and Engineering, Sichuan University-Pittsburgh Institute, Sichuan University, Chengdu 610065, ChinaDepartment of Materials Science and Engineering, Sichuan University-Pittsburgh Institute, Sichuan University, Chengdu 610065, ChinaDepartment of Materials Science and Engineering, Sichuan University-Pittsburgh Institute, Sichuan University, Chengdu 610065, ChinaDepartment of Materials Science and Engineering, Sichuan University-Pittsburgh Institute, Sichuan University, Chengdu 610065, ChinaThe Co-Pt binary system can form a two-phase nanochessboard structure comprising regularly aligned nanorods of magnetically hard tetragonal L1<sub>0</sub> phase and magnetically soft cubic L1<sub>2</sub> phase. This Co-Pt nanochessboard, being an exchange-coupled magnetic nanocomposite, exhibits a strong effect on magnetic domains and coercivity. While the ideal nanochessboard structure has tiles with equal edge lengths (a = b), the non-ideal or nonstandard nanochessboard structure has tiles with unequal edge lengths (a ≠ b). In this study, we employed phase-field modeling and computer simulation to systematically investigate the exchange coupling effect on magnetic properties in nonstandard nanochessboards. The simulations reveal that coercivity is dependent on the length scale, with magnetic hardening occurring below the critical exchange length, followed by magnetic softening above the critical exchange length, similar to the standard nanochessboards. Moreover, the presence of unequal edge lengths induces an anisotropic exchange coupling and shifts the coercivity peak with the length scale.https://www.mdpi.com/1996-1944/16/16/5689exchange couplingphase-field modelingnanochessboarddomain mechanism |
| spellingShingle | Keran Xu Jiabei Tang Yanzhe Wang Yinning Zhu Liwei D. Geng Phase-Field Study of Exchange Coupling in Co-Pt Nonstandard Nanochessboards Materials exchange coupling phase-field modeling nanochessboard domain mechanism |
| title | Phase-Field Study of Exchange Coupling in Co-Pt Nonstandard Nanochessboards |
| title_full | Phase-Field Study of Exchange Coupling in Co-Pt Nonstandard Nanochessboards |
| title_fullStr | Phase-Field Study of Exchange Coupling in Co-Pt Nonstandard Nanochessboards |
| title_full_unstemmed | Phase-Field Study of Exchange Coupling in Co-Pt Nonstandard Nanochessboards |
| title_short | Phase-Field Study of Exchange Coupling in Co-Pt Nonstandard Nanochessboards |
| title_sort | phase field study of exchange coupling in co pt nonstandard nanochessboards |
| topic | exchange coupling phase-field modeling nanochessboard domain mechanism |
| url | https://www.mdpi.com/1996-1944/16/16/5689 |
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