Magnetization reversal signatures of hybrid and pure Néel skyrmions in thin film multilayers
We report a study of magnetization reversals and skyrmion configurations in two systems, Pt/Co/MgO and Ir/Fe/Co/Pt multilayers, where magnetic skyrmions are stabilized by a combination of dipolar and Dzyaloshinskii–Moriya interactions (DMIs). The First Order Reversal Curve (FORC) diagrams of low-DMI...
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| Format: | Journal Article |
| Language: | English |
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2020
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| Online Access: | https://hdl.handle.net/10356/145473 |
| _version_ | 1826124232883437568 |
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| author | Duong, Nghiep Khoan Tomasello, Riccardo Raju, Masapogu Petrović, Alexander Paul Chiappini, Stefano Finocchio, Giovanni Panagopoulos, Christos |
| author2 | School of Physical and Mathematical Sciences |
| author_facet | School of Physical and Mathematical Sciences Duong, Nghiep Khoan Tomasello, Riccardo Raju, Masapogu Petrović, Alexander Paul Chiappini, Stefano Finocchio, Giovanni Panagopoulos, Christos |
| author_sort | Duong, Nghiep Khoan |
| collection | NTU |
| description | We report a study of magnetization reversals and skyrmion configurations in two systems, Pt/Co/MgO and Ir/Fe/Co/Pt multilayers, where magnetic skyrmions are stabilized by a combination of dipolar and Dzyaloshinskii–Moriya interactions (DMIs). The First Order Reversal Curve (FORC) diagrams of low-DMI Pt/Co/MgO and high-DMI Ir/Fe/Co/Pt exhibit stark differences, which are identified by micromagnetic simulations to be indicative of hybrid and pure Néel skyrmions, respectively. Tracking the evolution of FORC features in multilayers with dipolar interactions and DMI, we find that the negative FORC valley, typically accompanying the positive FORC peak near saturation, disappears under both reduced dipolar interactions and enhanced DMI. As these conditions favor the formation of pure Néel skyrmions, we propose that the resultant FORC feature—a single positive FORC peak near saturation—can act as a fingerprint for pure Néel skyrmions in multilayers. Our study thus expands on the utility of FORC analysis as a tool for characterizing spin topology in multilayer thin films. |
| first_indexed | 2024-10-01T06:17:18Z |
| format | Journal Article |
| id | ntu-10356/145473 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2024-10-01T06:17:18Z |
| publishDate | 2020 |
| record_format | dspace |
| spelling | ntu-10356/1454732023-02-28T19:27:35Z Magnetization reversal signatures of hybrid and pure Néel skyrmions in thin film multilayers Duong, Nghiep Khoan Tomasello, Riccardo Raju, Masapogu Petrović, Alexander Paul Chiappini, Stefano Finocchio, Giovanni Panagopoulos, Christos School of Physical and Mathematical Sciences Science::Chemistry Spintronics Magnetism We report a study of magnetization reversals and skyrmion configurations in two systems, Pt/Co/MgO and Ir/Fe/Co/Pt multilayers, where magnetic skyrmions are stabilized by a combination of dipolar and Dzyaloshinskii–Moriya interactions (DMIs). The First Order Reversal Curve (FORC) diagrams of low-DMI Pt/Co/MgO and high-DMI Ir/Fe/Co/Pt exhibit stark differences, which are identified by micromagnetic simulations to be indicative of hybrid and pure Néel skyrmions, respectively. Tracking the evolution of FORC features in multilayers with dipolar interactions and DMI, we find that the negative FORC valley, typically accompanying the positive FORC peak near saturation, disappears under both reduced dipolar interactions and enhanced DMI. As these conditions favor the formation of pure Néel skyrmions, we propose that the resultant FORC feature—a single positive FORC peak near saturation—can act as a fingerprint for pure Néel skyrmions in multilayers. Our study thus expands on the utility of FORC analysis as a tool for characterizing spin topology in multilayer thin films. Ministry of Education (MOE) National Research Foundation (NRF) Published version The work in Singapore was supported by the National Research Foundation (NRF) under NRF Investigatorship Programme (Reference No. NRF-NRFI2015-04) and Academic Research Fund (AcRF) Tier 3 from the Singapore Ministry of Education (MOE) (Reference No. MOE2018-T3-1-002). M.R. thanks the Data Storage Instituteof Singapore for sample growth facilities. R.T. and G.F. thank the project “Thunder SKY” funded from the Hellenic Foundation for Research and Innovation and the General Secretariat for Researchand Technology under Grant No. 871. 2020-12-22T08:40:31Z 2020-12-22T08:40:31Z 2020 Journal Article Duong, N. K., Tomasello, R., Raju, M., Petrović, A. P., Chiappini, S., Finocchio, G., & Panagopoulos, C. (2020). Magnetization reversal signatures of hybrid and pure Néel skyrmions in thin film multilayers. APL Materials, 8(11), 111112-. doi:10.1063/5.0022033 2166-532X https://hdl.handle.net/10356/145473 10.1063/5.0022033 11 8 en NRF-NRFI2015-04 MOE2018-T3-1-002 APL Materials © 2020 Author(s). All article content, except where otherwise noted, is licensed under a Creative Commons Attribution (CC BY) license(http://creativecommons.org/licenses/by/4.0/).https://doi.org/10.1063/5.0022033. application/pdf |
| spellingShingle | Science::Chemistry Spintronics Magnetism Duong, Nghiep Khoan Tomasello, Riccardo Raju, Masapogu Petrović, Alexander Paul Chiappini, Stefano Finocchio, Giovanni Panagopoulos, Christos Magnetization reversal signatures of hybrid and pure Néel skyrmions in thin film multilayers |
| title | Magnetization reversal signatures of hybrid and pure Néel skyrmions in thin film multilayers |
| title_full | Magnetization reversal signatures of hybrid and pure Néel skyrmions in thin film multilayers |
| title_fullStr | Magnetization reversal signatures of hybrid and pure Néel skyrmions in thin film multilayers |
| title_full_unstemmed | Magnetization reversal signatures of hybrid and pure Néel skyrmions in thin film multilayers |
| title_short | Magnetization reversal signatures of hybrid and pure Néel skyrmions in thin film multilayers |
| title_sort | magnetization reversal signatures of hybrid and pure neel skyrmions in thin film multilayers |
| topic | Science::Chemistry Spintronics Magnetism |
| url | https://hdl.handle.net/10356/145473 |
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