Control of the magnetic anisotropy in multi-repeat Pt/Co/Al heterostructures using magneto-ionic gating
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| Main Authors: | , , , , , , , , , , , , , , , , |
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| Format: | Preprint |
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2023
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| author | 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 |
| author_facet | 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 |
| contents | 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. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2310_01623 |
| institution | arXiv |
| publishDate | 2023 |
| record_format | arxiv |
| spellingShingle | Control of the magnetic anisotropy in multi-repeat Pt/Co/Al heterostructures using magneto-ionic gating 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 Materials Science 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. |
| title | Control of the magnetic anisotropy in multi-repeat Pt/Co/Al heterostructures using magneto-ionic gating |
| topic | Materials Science |
| url | https://arxiv.org/abs/2310.01623 |