Ultra-large mutually synchronized networks of 10 nm spin Hall nano-oscillators
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| Main Authors: | , , , , , , , |
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| Format: | Preprint |
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2025
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| _version_ | 1866910805886238720 |
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| author | Behera, Nilamani Chaurasiya, Avinash Kumar Kumar, Akash Khymyn, Roman Litvinenko, Artem Bainsla, Lakhan Awad, Ahmad A. Åkerman, Johan |
| author_facet | Behera, Nilamani Chaurasiya, Avinash Kumar Kumar, Akash Khymyn, Roman Litvinenko, Artem Bainsla, Lakhan Awad, Ahmad A. Åkerman, Johan |
| contents | While mutually interacting spin Hall nano-oscillators (SHNOs) hold great promise for wireless communication, neural networks, neuromorphic computing, and Ising machines, the highest number of synchronized SHNOs remains limited to $N$ = 64. Using ultra-narrow 10 and 20-nm nano-constrictions in W-Ta/CoFeB/MgO trilayers, we demonstrate mutually synchronized SHNO networks of up to $N$ = 105,000. The microwave power and quality factor scale as $N$ with new record values of 9 nW and $1.04 \times 10^6$, respectively. An unexpectedly strong array size dependence of the frequency-current tunability is explained by magnon exchange between nano-constrictions and magnon losses at the array edges, further corroborated by micromagnetic simulations and Brillouin light scattering microscopy. Our results represent a significant step towards viable SHNO network applications in wireless communication and unconventional computing. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2501_18321 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Ultra-large mutually synchronized networks of 10 nm spin Hall nano-oscillators Behera, Nilamani Chaurasiya, Avinash Kumar Kumar, Akash Khymyn, Roman Litvinenko, Artem Bainsla, Lakhan Awad, Ahmad A. Åkerman, Johan Mesoscale and Nanoscale Physics Applied Physics While mutually interacting spin Hall nano-oscillators (SHNOs) hold great promise for wireless communication, neural networks, neuromorphic computing, and Ising machines, the highest number of synchronized SHNOs remains limited to $N$ = 64. Using ultra-narrow 10 and 20-nm nano-constrictions in W-Ta/CoFeB/MgO trilayers, we demonstrate mutually synchronized SHNO networks of up to $N$ = 105,000. The microwave power and quality factor scale as $N$ with new record values of 9 nW and $1.04 \times 10^6$, respectively. An unexpectedly strong array size dependence of the frequency-current tunability is explained by magnon exchange between nano-constrictions and magnon losses at the array edges, further corroborated by micromagnetic simulations and Brillouin light scattering microscopy. Our results represent a significant step towards viable SHNO network applications in wireless communication and unconventional computing. |
| title | Ultra-large mutually synchronized networks of 10 nm spin Hall nano-oscillators |
| topic | Mesoscale and Nanoscale Physics Applied Physics |
| url | https://arxiv.org/abs/2501.18321 |