Abstract Ionic liquid gating has emerged as an attractive means of manipulating the magnetic properties of materials. Here, we report ionic liquid gating modulating the ferromagnetism of a Co film. A weak and strong saturation magnetization can be reversibly obtained by applying a negative voltage and a positive one, respectively. The modulation may be related with the oxidization and reduction of Co. Negative (or positive) gating voltages drive the oxygen ions to inject into (or extract from) Co layer of the sample, which oxidizes (or reduces) Co. These gating processes are reversible. Moreover, the magnetism of the gated states is considerably stable. It is a significant step towards designing low-power electric-controlling magnetic devices in future.

中文翻译：

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Co薄膜磁性的离子液体门控控制

摘要 离子液体门控已成为控制材料磁性的一种有吸引力的手段。在这里，我们报告了离子液体门控调节 Co 膜的铁磁性。通过分别施加负电压和正电压，可以可逆地获得弱饱和磁化强度和强饱和磁化强度。调制可能与 Co 的氧化和还原有关。 负（或正）门控电压驱动氧离子注入（或提取）样品的 Co 层，从而氧化（或还原）Co。这些门控过程是可逆的。此外，门控态的磁性相当稳定。这是未来设计低功率电控磁性器件的重要一步。