[20p-D61-1~14] 10.1 Emerging materials in spintronics and magnetics (including fabrication and characterization methodologies)

3:45 PM - 4:00 PM JST(6:45 AM - 7:00 AM UTC)English Presentation

[20p-D61-10] Preparation and characterization of Fe₃O₄ thin films on graphene

〇Shodai Iwasaki¹, Agus Subagyo¹, Eko Ishihara¹, Katsuyuki Yagi¹, Koki Nakane¹, Hidehiro Jonai¹, Eiji Hatta¹, Kazuhisa Sueoka¹ (1.IST, Hokkaido Univ.)

Keywords:

spintronics,graphene,Fe3O4

Since the initial reports in 2007, graphene has become a key material for spintronics due to its long spin diffusion lengths, weak spin-orbit interaction, long spin relaxation times, high mobility, and scalability. For spin-polarized electron injection, graphene is often paired with ferromagnetic materials, with interfacial properties crucial to device performance. This study investigates using Fe₃O₄, a half-metal, as the injection electrode, aiming to fabricate high-quality single-crystal Fe₃O₄ on graphene and achieve a high-quality Fe₃O₄/graphene interface. Initial attempts to grow Fe₃O₄ on HOPG and commercial graphene surfaces resulted in polycrystalline Fe₃O₄. To improve the crystallinity, in-situ fabrication of graphene and Fe₃O₄ growth is planned, along with the fabrication of graphene spin devices.