Control of the magnetic anisotropy in multirepeat Pt/Co/Al heterostructures using magnetoionic gating
(2024) Physical Review Applied — Vol. 21, n° 2, p. 24010 (2024)
Files
PhysRevApplied21024010.pdf
Open Access - Adobe PDF
- 8.27 MB
Details
- Authors
- Abstract
- Controlling magnetic properties through the application of an electric field is a significant challenge in modern nanomagnetism. In this study, we investigate the magnetoionic control of magnetic anisotropy in the topmost Co layer in Ta/Pt/[Co/Al/Pt]n/Co/Al/AlOx 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 AlOx, 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 nonvolatile 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◦ magnetic domain wall separating the perpendicular and in-plane anisotropy states. In the five-repetition multilayer, the modification leads to a doubling of the period of the magnetic domains at remanence. These results demonstrate that the magnetoionic 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.
- Affiliations
Citations
da Câmara Santa Clara Gomes, T., Bhatnagar-Schöffmann, T., Krishnia, S., Sassi, Y., Sanz-Hernández, D., Reyren, N., Martin, M.-B., Brunnett, F., Collin, S., Godel, F., Ono, S., Querlioz, D., Ravelosona, D., Cros, V., Grollier, J., Seneor, P., & Herrera Diez, L. (2024). Control of the magnetic anisotropy in multirepeat Pt/Co/Al heterostructures using magnetoionic gating. Physical Review Applied, 21(2), 24010. https://doi.org/10.1103/PhysRevApplied.21.024010 (Original work published 2024)