[21a-P02-1~50] 10 Spintronics and Magnetics(Poster)

▲ [21a-P02-14] Observation of magnetoresistance in Ni₇₈Fe₂₂/C8-BTBT/Ni₇₈Fe₂₂ nanojunctions at room temperature

〇Mizuki Matsuzaka¹, Yuma Sasaki², Kyohei Hayashi¹, Takahiro Misawa², Takashi Komine³, Tomoyuki Akutagawa⁴, Masaya Fujioka², Junji Nishii², Hideo Kaiju^1,5 (1.Keio Univ., 2.RIES, Hokkaido Univ., 3.Ibaraki Univ., 4.IMRAM, Tohoku Univ., 5.CSRN, Keio Univ.)

Keywords:molecular spintronics, magnetoresistance, nanojunction

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 investigate spin transport properties. Consequently, we observe a clear positive MR effect, that is, R_AP > R_P, where R_P and R_AP are the resistances in the parallel (P) and antiparallel (AP) configurations, respectively, of two magnetic electrodes in the Ni₇₈Fe₂₂/C8-BTBT/Ni₇₈Fe₂₂ nanojunctions at room temperature. The obtained results indicate that the spin signal through the C8-BTBT molecules can be successfully observed. This study provides a novel nanofabrication technique and opens up new opportunities for research in high-mobility molecular nano-spintronics.