门控
各向异性
物理
异质结
材料科学
凝聚态物理
光学
生物物理学
生物
作者
Tristan da Câmara Santa Clara Gomes,Tanvi Bhatnagar‐Schöffmann,Sachin Krishnia,Yanis Sassi,Dédalo Sanz-Hernández,Nicolas Reyren,Marie‐Blandine Martin,Frederic Brunnett,Sophie Collin,Florian Godel,Shimpei Ono,Damien Querlioz,D. Ravelosona,Vincent Cros,Julie Grollier,Pierre Sénéor,L. Herrera Diez
出处
期刊:Physical review applied
[American Physical Society]
日期:2024-02-06
卷期号:21 (2)
标识
DOI:10.1103/physrevapplied.21.024010
摘要
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 $\mathrm{Ta}$/$\mathrm{Pt}$/[$\mathrm{Co}$/$\mathrm{Al}$/$\mathrm{Pt}$]${}_{n}$/$\mathrm{Co}$/$\mathrm{Al}$/$\mathrm{Al}\mathrm{O}$${}_{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 $\mathrm{Al}$ layer between $\mathrm{Co}$ and ${\mathrm{Al}\mathrm{O}}_{x}$, 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 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 ${90}^{\ensuremath{\circ}}$ 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.
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