Efficient in-line skyrmion injection method for synthetic antiferromagnetic systems
Although it has been proposed that antiferromagnetically-coupled skyrmions can be driven at extremely high speeds, such skyrmions are near impossible to inject with current methods. In this paper, we propose the use of DMI-induced edge magnetization tilting to perform in-line skyrmion injection in a...
| Main Authors: | , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
IOP Publishing
2018-01-01
|
| Series: | New Journal of Physics |
| Subjects: | |
| Online Access: | https://doi.org/10.1088/1367-2630/aaa113 |
| _version_ | 1797750709731459072 |
|---|---|
| author | W L Gan S Krishnia W S Lew |
| author_facet | W L Gan S Krishnia W S Lew |
| author_sort | W L Gan |
| collection | DOAJ |
| description | Although it has been proposed that antiferromagnetically-coupled skyrmions can be driven at extremely high speeds, such skyrmions are near impossible to inject with current methods. In this paper, we propose the use of DMI-induced edge magnetization tilting to perform in-line skyrmion injection in a synthetic antiferromagnetic branched nanostructure. The proposed method circumvents the skyrmion topological protection and lowers the required current density. By allowing additional domain walls (DWs) to form on the branch, the threshold injection current density was further reduced by 59%. The increased efficiency was attributed to inter-DW repulsion and DW compression. The former acts as a multiplier to the effective field experienced by the pinned DW while the latter allows DWs to accumulate enough energy for depinning. The branch geometry also enables skyrmions to be shifted and deleted with the use of only three terminals, thus acting as a highly scalable skyrmion memory block. |
| first_indexed | 2024-03-12T16:37:49Z |
| format | Article |
| id | doaj.art-bfda60a9ff3546bea014016b115e39a1 |
| institution | Directory Open Access Journal |
| issn | 1367-2630 |
| language | English |
| last_indexed | 2024-03-12T16:37:49Z |
| publishDate | 2018-01-01 |
| publisher | IOP Publishing |
| record_format | Article |
| series | New Journal of Physics |
| spelling | doaj.art-bfda60a9ff3546bea014016b115e39a12023-08-08T14:50:08ZengIOP PublishingNew Journal of Physics1367-26302018-01-0120101302910.1088/1367-2630/aaa113Efficient in-line skyrmion injection method for synthetic antiferromagnetic systemsW L Gan0https://orcid.org/0000-0001-9278-0718S Krishnia1W S Lew2School of Physical and Mathematical Sciences, Nanyang Technological University , 21 Nanyang Link, Singapore 637371, SingaporeSchool of Physical and Mathematical Sciences, Nanyang Technological University , 21 Nanyang Link, Singapore 637371, SingaporeSchool of Physical and Mathematical Sciences, Nanyang Technological University , 21 Nanyang Link, Singapore 637371, SingaporeAlthough it has been proposed that antiferromagnetically-coupled skyrmions can be driven at extremely high speeds, such skyrmions are near impossible to inject with current methods. In this paper, we propose the use of DMI-induced edge magnetization tilting to perform in-line skyrmion injection in a synthetic antiferromagnetic branched nanostructure. The proposed method circumvents the skyrmion topological protection and lowers the required current density. By allowing additional domain walls (DWs) to form on the branch, the threshold injection current density was further reduced by 59%. The increased efficiency was attributed to inter-DW repulsion and DW compression. The former acts as a multiplier to the effective field experienced by the pinned DW while the latter allows DWs to accumulate enough energy for depinning. The branch geometry also enables skyrmions to be shifted and deleted with the use of only three terminals, thus acting as a highly scalable skyrmion memory block.https://doi.org/10.1088/1367-2630/aaa113skyrmionmagnetic memoryspin-orbit torquespin Hall effectdomain wall |
| spellingShingle | W L Gan S Krishnia W S Lew Efficient in-line skyrmion injection method for synthetic antiferromagnetic systems New Journal of Physics skyrmion magnetic memory spin-orbit torque spin Hall effect domain wall |
| title | Efficient in-line skyrmion injection method for synthetic antiferromagnetic systems |
| title_full | Efficient in-line skyrmion injection method for synthetic antiferromagnetic systems |
| title_fullStr | Efficient in-line skyrmion injection method for synthetic antiferromagnetic systems |
| title_full_unstemmed | Efficient in-line skyrmion injection method for synthetic antiferromagnetic systems |
| title_short | Efficient in-line skyrmion injection method for synthetic antiferromagnetic systems |
| title_sort | efficient in line skyrmion injection method for synthetic antiferromagnetic systems |
| topic | skyrmion magnetic memory spin-orbit torque spin Hall effect domain wall |
| url | https://doi.org/10.1088/1367-2630/aaa113 |
| work_keys_str_mv | AT wlgan efficientinlineskyrmioninjectionmethodforsyntheticantiferromagneticsystems AT skrishnia efficientinlineskyrmioninjectionmethodforsyntheticantiferromagneticsystems AT wslew efficientinlineskyrmioninjectionmethodforsyntheticantiferromagneticsystems |