Helium Ions Put Magnetic Skyrmions on the Track
Magnetic skyrmions are deemed to be the forerunners of novel spintronic memory and logic devices. While their observation and their current-driven motion at room temperature have been demonstrated, certain issues regarding their nucleation, stability, pinning, and skyrmion Hall effect still need to...
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| Veröffentlicht in: | Nano letters 2021-04, Vol.21 (7), p.2989-2996 |
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| creator | Juge, Roméo Bairagi, Kaushik Rana, Kumari Gaurav Vogel, Jan Sall, Mamour Mailly, Dominique Pham, Van Tuong Zhang, Qiang Sisodia, Naveen Foerster, Michael Aballe, Lucia Belmeguenai, Mohamed Roussigné, Yves Auffret, Stéphane Buda-Prejbeanu, Liliana D Gaudin, Gilles Ravelosona, Dafiné Boulle, Olivier |
| description | Magnetic skyrmions are deemed to be the forerunners of novel spintronic memory and logic devices. While their observation and their current-driven motion at room temperature have been demonstrated, certain issues regarding their nucleation, stability, pinning, and skyrmion Hall effect still need to be overcome to realize functional devices. Here, we demonstrate that focused He+-ion-irradiation can be used to create and guide skyrmions in racetracks. We show that the reduction of the perpendicular magnetic anisotropy and Dzyaloshinskii–Moriya interaction in the track defined by ion-irradiation leads to the formation of stable isolated skyrmions. Current-driven skyrmion motion experiments and simulations reveal that the skyrmions move along the irradiated track, resulting in the suppression of the skyrmion Hall effect, and that the maximum skyrmion velocity can be enhanced by tuning the magnetic properties. These results open up a new path to nucleate and guide magnetic skyrmions in racetrack devices. |
| doi_str_mv | 10.1021/acs.nanolett.1c00136 |
| format | Article |
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| title | Helium Ions Put Magnetic Skyrmions on the Track |
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