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Spin-orbit torque–driven propagating spin waves
Spin-orbit torque (SOT) can drive sustained spin wave (SW) auto-oscillations in a class of emerging microwave devices known as spin Hall nano-oscillators (SHNOs), which have highly nonlinear properties governing robust mutual synchronization at frequencies directly amenable to high-speed neuromorphi...
Autores principales: | , , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
American Association for the Advancement of Science
2019
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6868678/ https://www.ncbi.nlm.nih.gov/pubmed/31799403 http://dx.doi.org/10.1126/sciadv.aax8467 |
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author | Fulara, H. Zahedinejad, M. Khymyn, R. Awad, A. A. Muralidhar, S. Dvornik, M. Åkerman, J. |
author_facet | Fulara, H. Zahedinejad, M. Khymyn, R. Awad, A. A. Muralidhar, S. Dvornik, M. Åkerman, J. |
author_sort | Fulara, H. |
collection | PubMed |
description | Spin-orbit torque (SOT) can drive sustained spin wave (SW) auto-oscillations in a class of emerging microwave devices known as spin Hall nano-oscillators (SHNOs), which have highly nonlinear properties governing robust mutual synchronization at frequencies directly amenable to high-speed neuromorphic computing. However, all demonstrations have relied on localized SW modes interacting through dipolar coupling and/or direct exchange. As nanomagnonics requires propagating SWs for data transfer and additional computational functionality can be achieved using SW interference, SOT-driven propagating SWs would be highly advantageous. Here, we demonstrate how perpendicular magnetic anisotropy can raise the frequency of SOT-driven auto-oscillations in magnetic nanoconstrictions well above the SW gap, resulting in the efficient generation of field and current tunable propagating SWs. Our demonstration greatly extends the functionality and design freedom of SHNOs, enabling long-range SOT-driven SW propagation for nanomagnonics, SW logic, and neuromorphic computing, directly compatible with CMOS technology. |
format | Online Article Text |
id | pubmed-6868678 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2019 |
publisher | American Association for the Advancement of Science |
record_format | MEDLINE/PubMed |
spelling | pubmed-68686782019-12-03 Spin-orbit torque–driven propagating spin waves Fulara, H. Zahedinejad, M. Khymyn, R. Awad, A. A. Muralidhar, S. Dvornik, M. Åkerman, J. Sci Adv Research Articles Spin-orbit torque (SOT) can drive sustained spin wave (SW) auto-oscillations in a class of emerging microwave devices known as spin Hall nano-oscillators (SHNOs), which have highly nonlinear properties governing robust mutual synchronization at frequencies directly amenable to high-speed neuromorphic computing. However, all demonstrations have relied on localized SW modes interacting through dipolar coupling and/or direct exchange. As nanomagnonics requires propagating SWs for data transfer and additional computational functionality can be achieved using SW interference, SOT-driven propagating SWs would be highly advantageous. Here, we demonstrate how perpendicular magnetic anisotropy can raise the frequency of SOT-driven auto-oscillations in magnetic nanoconstrictions well above the SW gap, resulting in the efficient generation of field and current tunable propagating SWs. Our demonstration greatly extends the functionality and design freedom of SHNOs, enabling long-range SOT-driven SW propagation for nanomagnonics, SW logic, and neuromorphic computing, directly compatible with CMOS technology. American Association for the Advancement of Science 2019-09-27 /pmc/articles/PMC6868678/ /pubmed/31799403 http://dx.doi.org/10.1126/sciadv.aax8467 Text en Copyright © 2019 The Authors, some rights reserved; exclusive licensee American Association for the Advancement of Science. No claim to original U.S. Government Works. Distributed under a Creative Commons Attribution License 4.0 (CC BY). http://creativecommons.org/licenses/by/4.0/ This is an open-access article distributed under the terms of the Creative Commons Attribution license (http://creativecommons.org/licenses/by/4.0/) , which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. |
spellingShingle | Research Articles Fulara, H. Zahedinejad, M. Khymyn, R. Awad, A. A. Muralidhar, S. Dvornik, M. Åkerman, J. Spin-orbit torque–driven propagating spin waves |
title | Spin-orbit torque–driven propagating spin waves |
title_full | Spin-orbit torque–driven propagating spin waves |
title_fullStr | Spin-orbit torque–driven propagating spin waves |
title_full_unstemmed | Spin-orbit torque–driven propagating spin waves |
title_short | Spin-orbit torque–driven propagating spin waves |
title_sort | spin-orbit torque–driven propagating spin waves |
topic | Research Articles |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6868678/ https://www.ncbi.nlm.nih.gov/pubmed/31799403 http://dx.doi.org/10.1126/sciadv.aax8467 |
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