Enhancement of Dynamical Coupling in Artificial Spin‐Ice Systems by Incorporating Perpendicularly Magnetized Ferromagnetic Matrix
Artificial spin‐ice (ASI) systems, consisting of arrays of interacting ferromagnetic nanoelements, offer a versatile platform for reconfigurable magnonics with potential in GHz logic and neuromorphic computing. However, weak dipolar coupling between nanoelements severely limits their functionality....
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| Format: | Article |
| Language: | English |
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Wiley-VCH
2025-07-01
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| Series: | Small Structures |
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| Online Access: | https://doi.org/10.1002/sstr.202400627 |
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| _version_ | 1849428551739113472 |
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| author | Syamlal Sankaran Kunnath Mateusz Zelent Mathieu Moalic Maciej Krawczyk |
| author_facet | Syamlal Sankaran Kunnath Mateusz Zelent Mathieu Moalic Maciej Krawczyk |
| author_sort | Syamlal Sankaran Kunnath |
| collection | DOAJ |
| description | Artificial spin‐ice (ASI) systems, consisting of arrays of interacting ferromagnetic nanoelements, offer a versatile platform for reconfigurable magnonics with potential in GHz logic and neuromorphic computing. However, weak dipolar coupling between nanoelements severely limits their functionality. A rich spin‐wave spectrum is numerically demonstrated in an ASI structure immersed in a perpendicularly magnetized ferromagnetic matrix, which is different from a conventional ASI system. A strong magnon–magnon coupling is observed between the bulk second‐order mode of the ASI and the fundamental mode of the matrix, supported by a pronounced anticrossing frequency gap. It is shown that, in addition to the internanoelement dipolar coupling, exchange interactions at the nanoelement‐matrix interface play a crucial role in this hybridization. Furthermore, the strength of the coupling can be enhanced by almost 40% just by reconfiguring the magnetization at the vertices from low‐energy to high‐energy monopole states. These results open the way to exploit ASI systems for magnonic applications, taking advantage of the strong coupling and vertex‐dependent dynamics. |
| format | Article |
| id | doaj-art-6f4f7e5e55dd4e26ae78f2e745f5b837 |
| institution | Kabale University |
| issn | 2688-4062 |
| language | English |
| publishDate | 2025-07-01 |
| publisher | Wiley-VCH |
| record_format | Article |
| series | Small Structures |
| spelling | doaj-art-6f4f7e5e55dd4e26ae78f2e745f5b8372025-08-20T03:28:40ZengWiley-VCHSmall Structures2688-40622025-07-0167n/an/a10.1002/sstr.202400627Enhancement of Dynamical Coupling in Artificial Spin‐Ice Systems by Incorporating Perpendicularly Magnetized Ferromagnetic MatrixSyamlal Sankaran Kunnath0Mateusz Zelent1Mathieu Moalic2Maciej Krawczyk3Institute of Spintronics and Quantum Information Faculty of Physics and Astronomy Adam Mickiewicz University 61‐614 Poznan PolandInstitute of Spintronics and Quantum Information Faculty of Physics and Astronomy Adam Mickiewicz University 61‐614 Poznan PolandInstitute of Spintronics and Quantum Information Faculty of Physics and Astronomy Adam Mickiewicz University 61‐614 Poznan PolandInstitute of Spintronics and Quantum Information Faculty of Physics and Astronomy Adam Mickiewicz University 61‐614 Poznan PolandArtificial spin‐ice (ASI) systems, consisting of arrays of interacting ferromagnetic nanoelements, offer a versatile platform for reconfigurable magnonics with potential in GHz logic and neuromorphic computing. However, weak dipolar coupling between nanoelements severely limits their functionality. A rich spin‐wave spectrum is numerically demonstrated in an ASI structure immersed in a perpendicularly magnetized ferromagnetic matrix, which is different from a conventional ASI system. A strong magnon–magnon coupling is observed between the bulk second‐order mode of the ASI and the fundamental mode of the matrix, supported by a pronounced anticrossing frequency gap. It is shown that, in addition to the internanoelement dipolar coupling, exchange interactions at the nanoelement‐matrix interface play a crucial role in this hybridization. Furthermore, the strength of the coupling can be enhanced by almost 40% just by reconfiguring the magnetization at the vertices from low‐energy to high‐energy monopole states. These results open the way to exploit ASI systems for magnonic applications, taking advantage of the strong coupling and vertex‐dependent dynamics.https://doi.org/10.1002/sstr.202400627artificial spin iceferromagnetic resonancemagnetization dynamicsmagnon–magnon couplingreconfigurable magnonics |
| spellingShingle | Syamlal Sankaran Kunnath Mateusz Zelent Mathieu Moalic Maciej Krawczyk Enhancement of Dynamical Coupling in Artificial Spin‐Ice Systems by Incorporating Perpendicularly Magnetized Ferromagnetic Matrix Small Structures artificial spin ice ferromagnetic resonance magnetization dynamics magnon–magnon coupling reconfigurable magnonics |
| title | Enhancement of Dynamical Coupling in Artificial Spin‐Ice Systems by Incorporating Perpendicularly Magnetized Ferromagnetic Matrix |
| title_full | Enhancement of Dynamical Coupling in Artificial Spin‐Ice Systems by Incorporating Perpendicularly Magnetized Ferromagnetic Matrix |
| title_fullStr | Enhancement of Dynamical Coupling in Artificial Spin‐Ice Systems by Incorporating Perpendicularly Magnetized Ferromagnetic Matrix |
| title_full_unstemmed | Enhancement of Dynamical Coupling in Artificial Spin‐Ice Systems by Incorporating Perpendicularly Magnetized Ferromagnetic Matrix |
| title_short | Enhancement of Dynamical Coupling in Artificial Spin‐Ice Systems by Incorporating Perpendicularly Magnetized Ferromagnetic Matrix |
| title_sort | enhancement of dynamical coupling in artificial spin ice systems by incorporating perpendicularly magnetized ferromagnetic matrix |
| topic | artificial spin ice ferromagnetic resonance magnetization dynamics magnon–magnon coupling reconfigurable magnonics |
| url | https://doi.org/10.1002/sstr.202400627 |
| work_keys_str_mv | AT syamlalsankarankunnath enhancementofdynamicalcouplinginartificialspinicesystemsbyincorporatingperpendicularlymagnetizedferromagneticmatrix AT mateuszzelent enhancementofdynamicalcouplinginartificialspinicesystemsbyincorporatingperpendicularlymagnetizedferromagneticmatrix AT mathieumoalic enhancementofdynamicalcouplinginartificialspinicesystemsbyincorporatingperpendicularlymagnetizedferromagneticmatrix AT maciejkrawczyk enhancementofdynamicalcouplinginartificialspinicesystemsbyincorporatingperpendicularlymagnetizedferromagneticmatrix |