Giant Spin Pumping at Polymer/Ferromagnet Interfaces for Hybrid Spintronic Devices
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arXiv
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| Autori principali: | , , , , , , , |
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| Natura: | Preprint |
| Pubblicazione: |
2025
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| author | Gaur, Shiva Kumar, Akash Bangar, Himanshu Shashank, Utkarsh Singh, Hukum Dash, Saroj P. Raghav, Anubhav Åkerman, Johan |
| author_facet | Gaur, Shiva Kumar, Akash Bangar, Himanshu Shashank, Utkarsh Singh, Hukum Dash, Saroj P. Raghav, Anubhav Åkerman, Johan |
| contents | While the growing utilization of polymers in flexible electronic devices has sparked significant interest in polymer/metal interfaces, spintronic studies of such interfaces remain limited. Here, we systematically study spin pumping across a polymer/ferromagnet metal interface between hydrogen silsesquioxane (HSQ) oligomer layers ($t_\mathit{HSQ} = 30, 36, 48$ nm) and NiFe ($t_\mathit{NiFe} = 4, 5, 7, 10$ nm) thin films. Using ferromagnetic resonance measurements, we observe strong spin pumping (large linewidth broadening) and a giant spin mixing conductance, reaching 19.8~${\rm nm^{-2}}$ for HSQ = 48 nm, \emph{i.e.}~comparable to that of heavy metals. Our results suggest efficient spin transfer across the HSQ/NiFe interface, possibly originating from a combination of spin and orbital pumping, and provide valuable insights for designing self-powered and flexible spintronic devices utilizing polymers in combination with ferromagnetic materials. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2503_22623 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Giant Spin Pumping at Polymer/Ferromagnet Interfaces for Hybrid Spintronic Devices Gaur, Shiva Kumar, Akash Bangar, Himanshu Shashank, Utkarsh Singh, Hukum Dash, Saroj P. Raghav, Anubhav Åkerman, Johan Mesoscale and Nanoscale Physics While the growing utilization of polymers in flexible electronic devices has sparked significant interest in polymer/metal interfaces, spintronic studies of such interfaces remain limited. Here, we systematically study spin pumping across a polymer/ferromagnet metal interface between hydrogen silsesquioxane (HSQ) oligomer layers ($t_\mathit{HSQ} = 30, 36, 48$ nm) and NiFe ($t_\mathit{NiFe} = 4, 5, 7, 10$ nm) thin films. Using ferromagnetic resonance measurements, we observe strong spin pumping (large linewidth broadening) and a giant spin mixing conductance, reaching 19.8~${\rm nm^{-2}}$ for HSQ = 48 nm, \emph{i.e.}~comparable to that of heavy metals. Our results suggest efficient spin transfer across the HSQ/NiFe interface, possibly originating from a combination of spin and orbital pumping, and provide valuable insights for designing self-powered and flexible spintronic devices utilizing polymers in combination with ferromagnetic materials. |
| title | Giant Spin Pumping at Polymer/Ferromagnet Interfaces for Hybrid Spintronic Devices |
| topic | Mesoscale and Nanoscale Physics |
| url | https://arxiv.org/abs/2503.22623 |