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Current induced domain wall motion and tilting in Pt/Co/Ta structures with perpendicular magnetic anisotropy in the presence of the Dyzaloshinskii–Moriya interaction
| Content Provider | Scilit |
|---|---|
| Author | Yun, Ji Jun Li, Dong Cui, Baoshan Guo, Xiaobin Wu, Kai Zhang, Xu Wang, Yupei Mao, Jian Zuo, Yalu Xi, Li |
| Copyright Year | 2018 |
| Description | Journal: Journal of Physics D: Applied Physics Current induced domain wall motion (CIDWM) was studied in Pt/Co/Ta structures with perpendicular magnetic anisotropy and the Dyzaloshinskii-Moriya interaction (DMI) by the spin orbit torque (SOT). We measured the strength of DMI and SOT efficiency in Pt/Co/Ta with the variation of the thickness of Ta using a current induced hysteresis loop shift method. The results indicate that the DMI stabilizes a chiral Néel-type domain wall (DW), and the DW motion can be driven by the enhanced large SOT generated from Pt and Ta with opposite signs of spin Hall angle in Pt/Co/Ta stacks. The CIDWM velocity, which is 10^4 times larger than the field driven DW velocity, obeys a creep law, and reaches around tens of meters per second with current density of ~10^6 A/cm^2. We also found that the Joule heating accompanied with current also accelerates the DW motion. Meanwhile, a domain wall tilting was observed, which increases with current density increasing. These results can be explained by the spin Hall effect generated from both heavy metals Pt and Ta, inherent DMI, and the current accompanying Joule heating effect. Our results could provide some new designing prospects to move multiple DWs by SOT for achieving racetrack memories. |
| Related Links | http://iopscience.iop.org/article/10.1088/1361-6463/aab419/pdf |
| ISSN | 00223727 |
| e-ISSN | 13616463 |
| DOI | 10.1088/1361-6463/aab419 |
| Journal | Journal of Physics D: Applied Physics |
| Issue Number | 15 |
| Volume Number | 51 |
| Language | English |
| Publisher | IOP Publishing |
| Publisher Date | 2018-03-05 |
| Access Restriction | Open |
| Subject Keyword | Journal: Journal of Physics D: Applied Physics Condensed Matter Physics |
| Content Type | Text |
| Resource Type | Article |
| Subject | Surfaces, Coatings and Films Acoustics and Ultrasonics Condensed Matter Physics Electronic, Optical and Magnetic Materials |
