Presentation Information
[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.)
Keywords:
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.