Stabilizing zero-field skyrmions in Ir/Fe/Co/Pt thin film multilayers by magnetic history control
We present a study of the stability of room-temperature skyrmions in [Ir/Fe/Co/Pt] thin film multilayers, using the First Order Reversal Curve (FORC) technique and magnetic force microscopy (MFM). FORC diagrams reveal irreversible changes in magnetization upon field reversals, which can be correlate...
| Main Authors: | , , , , , |
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| Other Authors: | |
| Format: | Journal Article |
| Language: | English |
| Published: |
2019
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| Online Access: | https://hdl.handle.net/10356/103516 http://hdl.handle.net/10220/47789 |
| _version_ | 1826124172731875328 |
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| author | Petrović, Alexander Paul Tomasello, R. Finocchio, G. Panagopoulos, Christos Duong, Nghiep Khoan Raju, M. |
| author2 | School of Physical and Mathematical Sciences |
| author_facet | School of Physical and Mathematical Sciences Petrović, Alexander Paul Tomasello, R. Finocchio, G. Panagopoulos, Christos Duong, Nghiep Khoan Raju, M. |
| author_sort | Petrović, Alexander Paul |
| collection | NTU |
| description | We present a study of the stability of room-temperature skyrmions in [Ir/Fe/Co/Pt] thin film multilayers, using the First Order Reversal Curve (FORC) technique and magnetic force microscopy (MFM). FORC diagrams reveal irreversible changes in magnetization upon field reversals, which can be correlated with the evolution of local magnetic textures probed by MFM. Using this approach, we have identified two different mechanisms—(1) skyrmion merger and (2) skyrmion nucleation followed by stripe propagation—which facilitate magnetization reversal in a changing magnetic field. Analysing the signatures of these mechanisms in the FORC diagram allows us to identify magnetic “histories”—i.e., precursor field sweep protocols—capable of enhancing the final zero-field skyrmion density. Our results indicate that FORC measurements can play a useful role in characterizing spin topology in thin film multilayers and are particularly suitable for identifying samples in which skyrmion populations can be stabilized at zero field. |
| first_indexed | 2024-10-01T06:16:19Z |
| format | Journal Article |
| id | ntu-10356/103516 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2024-10-01T06:16:19Z |
| publishDate | 2019 |
| record_format | dspace |
| spelling | ntu-10356/1035162023-02-28T19:43:59Z Stabilizing zero-field skyrmions in Ir/Fe/Co/Pt thin film multilayers by magnetic history control Petrović, Alexander Paul Tomasello, R. Finocchio, G. Panagopoulos, Christos Duong, Nghiep Khoan Raju, M. School of Physical and Mathematical Sciences Magnetic Hysteresis Magnetic Force Microscopy DRNTU::Science::Physics We present a study of the stability of room-temperature skyrmions in [Ir/Fe/Co/Pt] thin film multilayers, using the First Order Reversal Curve (FORC) technique and magnetic force microscopy (MFM). FORC diagrams reveal irreversible changes in magnetization upon field reversals, which can be correlated with the evolution of local magnetic textures probed by MFM. Using this approach, we have identified two different mechanisms—(1) skyrmion merger and (2) skyrmion nucleation followed by stripe propagation—which facilitate magnetization reversal in a changing magnetic field. Analysing the signatures of these mechanisms in the FORC diagram allows us to identify magnetic “histories”—i.e., precursor field sweep protocols—capable of enhancing the final zero-field skyrmion density. Our results indicate that FORC measurements can play a useful role in characterizing spin topology in thin film multilayers and are particularly suitable for identifying samples in which skyrmion populations can be stabilized at zero field. NRF (Natl Research Foundation, S’pore) MOE (Min. of Education, S’pore) Published version 2019-03-07T06:40:27Z 2019-12-06T21:14:23Z 2019-03-07T06:40:27Z 2019-12-06T21:14:23Z 2019 Journal Article Duong, N. K., Raju, M., Petrović, A. P., Tomasello, R., Finocchio, G., & Panagopoulos, C. (2019). Stabilizing zero-field skyrmions in Ir/Fe/Co/Pt thin film multilayers by magnetic history control. Applied Physics Letters, 114(7), 072401-. doi:10.1063/1.5080713 0003-6951 https://hdl.handle.net/10356/103516 http://hdl.handle.net/10220/47789 10.1063/1.5080713 en Applied Physics Letters © 2018 Authors. All rights reserved. This paper was published by AIP Publishing in Applied Physics Letters and is made available with permission of Authors. 5 p. application/pdf |
| spellingShingle | Magnetic Hysteresis Magnetic Force Microscopy DRNTU::Science::Physics Petrović, Alexander Paul Tomasello, R. Finocchio, G. Panagopoulos, Christos Duong, Nghiep Khoan Raju, M. Stabilizing zero-field skyrmions in Ir/Fe/Co/Pt thin film multilayers by magnetic history control |
| title | Stabilizing zero-field skyrmions in Ir/Fe/Co/Pt thin film multilayers by magnetic history control |
| title_full | Stabilizing zero-field skyrmions in Ir/Fe/Co/Pt thin film multilayers by magnetic history control |
| title_fullStr | Stabilizing zero-field skyrmions in Ir/Fe/Co/Pt thin film multilayers by magnetic history control |
| title_full_unstemmed | Stabilizing zero-field skyrmions in Ir/Fe/Co/Pt thin film multilayers by magnetic history control |
| title_short | Stabilizing zero-field skyrmions in Ir/Fe/Co/Pt thin film multilayers by magnetic history control |
| title_sort | stabilizing zero field skyrmions in ir fe co pt thin film multilayers by magnetic history control |
| topic | Magnetic Hysteresis Magnetic Force Microscopy DRNTU::Science::Physics |
| url | https://hdl.handle.net/10356/103516 http://hdl.handle.net/10220/47789 |
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