[21a-P02-1~50] 10 スピントロニクス・マグネティクス(ポスター)

▲ [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.)

キーワード：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.