有機スピントロニクスにおける有機分子/強磁性金属間界面の制御
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概要
- 論文の詳細を見る
Recently, research field of organic molecular spintronics has attracted much attention. One of important issues in this field is to clarify mechanisms of spin injection from ferromagnetic materials into organic molecules. The flatter interface between an organic molecular layer and a ferromagnetic electrode as a spin injector is, the more efficiently spin-polarized carriers are injected. In our study, a planer-type structure that had the flatter interface was adopted. By using electron beam lithography, photolithography and vacuum vapor deposition, Ni80Fe20/tris-(hydroxyquinolinato)-aluminum(Alq3)/Ni80Fe20 junctions were fabricated and the magnetoresistance (MR) effect was investigated. Devices having shorter distance between Ni80Fe20 electrodes showed the MR effect. Origins of the MR were investigated by the devices with nonmagnetic electrodes, by the devices with tunnel barriers at the interface between the Alq3 and the Ni80Fe20, and by the devices with another molecule. As the result, it was suggested that the MR was mainly originated from a local magnetic state on the Ni80Fe20 surface.
- 日本真空協会の論文
- 2008-09-20