[8a-Z23-1~10] 【CS.4】 4.5 Nanocarbon and 2D Materialsと17 ナノカーボンのコードシェアセッション

▲ [8a-Z23-2] Magnetic proximity effects in graphene/chromia heterostructures

〇(D)keke he¹、Ather Mahmood²、Will Echtenkamp²、Chun-Pui Kwan¹、Michael Randle¹、Chinmoy Saha¹、Peter Dowben²、Christian Binek²、Uttam Singisetti¹、Jonathan Bird¹ (1.Univ. at Buffalo、2.Univ. of Nebraska-Lincoln)

キーワード：magnetic proximity effect, graphene, magnetoelectrics

In our study, we have investigated the signatures of spin transport in heterostructures formed from CVD-graphene and chromia (Cr₂O₃). Chromia is an insulating magneto-electric, exhibiting antiferromagnetic character in bulk up to an elevated Neel temperature of 307 K. Recently, however, it has been demonstrated that the (0001) surface of this material exhibits the phenomenon of boundary magnetism. The magneto-electric nature of the chromia allows the direction of the net magnetism at this surface to be reversed electrically, by application of an appropriate voltage in the simultaneous presence of magnetic field and with low power dissipation. As a substrate, chromia offers room-temperature control of magnetic proximity effects in graphene, in marked contrast to previously reported ferromagnetic insulators.