Electrical Control of Magnetism through Proton Migration in Fe3O4/Graphene Heterostructure

• DOI: 10.1021/acs.nanolett.2c00838
• Publication Date: 2022-05-26T13:12:00Z
• Authors: Weikang Liu; Liang Liu; Bin Cheng; Hongwei Qin; Guangjun Zhou; Bin Cui; Jifan Hu
• Keywords: Magnetism

Ion migration has direct and crucial bearing on the crystal lattice field, electron filling, orbital occupation spin polarization, which in turn changes physical properties. Electric field is an effective way to control ion migration, but it may include simultaneous movement of multiple ions increase complexity system. Therefore, controllable selective single with unambiguous mechanism highly desired. Here, magnetic moments Fe3O4 could be reversibly controlled by ionic liquid gating basis pure protons. A bilayer graphene serve as sieve, allowing only protons rather than oxygen or hydroxyl groups participate process, thus guaranteeing reversibility property changes. This work expected supply ideal arena for electrically sketching functionalities solid state materials based migration.