講演情報
[21p-C501-8]Evaluation of structural, electrical and magnetic properties in nanoscale junctions using high-mobility molecules
〇Mizuki Matsuzaka1, Takahiro Misawa2, Ryunosuke Miyamoto1, Zijing Zhang1, Kenta Sato1, Yuma Sasaki2, Junji Nishii2, Hideo Kaiju1,3 (1.Keio Univ., 2.RIES, Hokkaido Univ., 3.CSRN, Keio Univ.)
キーワード：
molecular spintronics、high mobility、nanodevice
Molecular spintronic devices are attractive owing to the expected long spin diffusion lengths in organic molecules. In this study, towards the observation of room-temperature magnetoresistance (MR) effect, we fabricate magnetic nanojunctions, which consist of high-mobility molecules, 2,7-dioctyl[1]benzothieno[3,2-b][1]benzothiophene (C8-BTBT), sandwiched between two Ni78Fe22 thin films with crossed edges and evaluate their structural, electrical and magnetic properties. As a result, we can successfully fabricate the Ni78Fe22/C8-BTBT/Ni78Fe22 nanoscale junctions with a junction area of 7.5×7.5, 20×20 and 42×42 nm2. In addition, a clear positive MR effect is observed in the Ni78Fe22/C8-BTBT/Ni78Fe22 nanoscale junctions at room temperature. The obtained results indicate that the spin signal through the C8-BTBT molecules can be successfully observed. This study opens up new avenue of fabrication technique of nanoscale junctions and research in high-mobility molecular nano-spintronics.