Control of the magnetic anisotropy in multi-repeat Pt/Co/Al heterostructures using magneto-ionic gating
| Autor: | Gomes, Tristan da Câmara Santa Clara, Bhatnagar-Schöffmann, Tanvi, Krishnia, Sachin, Sassi, Yanis, Sanz-Hernández, Dedalo, Reyren, Nicolas, Martin, Marie-Blandine, Brunnett, Frederic, Collin, Sophie, Godel, Florian, Ono, Shimpei, Querlioz, Damien, Ravelosona, Dafiné, Cros, Vincent, Grollier, Julie, Seneor, Pierre, Diez, Liza Herrera |
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| Rok vydání: | 2023 |
| Předmět: | |
| Zdroj: | Physical Review Applied 21, 024010 (2024) |
| Druh dokumentu: | Working Paper |
| DOI: | 10.1103/PhysRevApplied.21.024010 |
| Popis: | Controlling magnetic properties through the application of an electric field is a significant challenge in modern nanomagnetism. In this study, we investigate the magneto-ionic control of magnetic anisotropy in the topmost Co layer in Ta/Pt/[Co/Al/Pt]$_n$/Co/Al/AlO$_\text{x}$ multilayer stacks comprising $n +1$ Co layers and its impact on the magnetic properties of the multilayers. We demonstrate that the perpendicular magnetic anisotropy can be reversibly quenched through gate-driven oxidation of the intermediary Al layer between Co and AlO$_\text{x}$, enabling dynamic control of the magnetic layers contributing to the out-of-plane remanence - varying between $n$ and $n +1$. For multilayer configurations with $n = 2$ and $n = 4$, we observe reversible and non-volatile additions of 1/3 and 1/5, respectively, to the anomalous Hall effect amplitude based on the applied gate voltage. Magnetic imaging reveals that the gate-induced spin-reorientation transition occurs through the propagation of a single 90$^{\circ}$ magnetic domain wall separating the perpendicular and in-plane anisotropy states. In the 5-repetition multilayer, the modification leads to a doubling of the period of the magnetic domains at remanence. These results demonstrate that the magneto-ionic control of the anisotropy of a single magnetic layer can be used to control the magnetic properties of coupled multilayer systems, extending beyond the gating effects on a single magnetic layer. Comment: 9 pages + 3 pages of supplementary materials, 5 main figures + 6 supplementary figures |
| Databáze: | arXiv |
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