[11p-E208-1~10] 10.3 Spin devices, magnetic memories and storages

1:30 PM - 1:45 PM JST(4:30 AM - 4:45 AM UTC)Presentation by Applicant for JSAP Young Scientists Presentation AwardEnglish Presentation

[11p-E208-1] Fabrication of nanojunctions using fullerene and their structural, electrical and magnetic properties

〇Koki Terai¹, Mizuki Matsuzaka¹, Takumi Ueda¹, Hideo Kaiju^1,2 (1.Keio Univ., 2.CSRN, Keio Univ.)

Keywords:

Molecular spintronics,Nanojunctions,Fullerene

Molecular spintronics has attracted considerable attention due to long spin-relaxation times in devices. Recently, we have observed a room-temperature magnetoresistance (MR) effect in molecular nanojunctions using Ni₇₈Fe₂₂ (Py) thin-film edges and high-mobility molecules. Here, to further broaden the scope of molecular nanojunctions, we focus on fullerene (C₆₀) as the sandwiched molecules. Previous studies have demonstrated a high spin polarization at the interface between Co and C₆₀. In this study, we fabricate and evaluate Py/C₆₀/Py nanojunctions as a first step. Subsequently, toward the creation of Co/C₆₀/Co nanojunctions, we fabricate and evaluate Co electrodes. As a result, a positive MR effect is clearly observed in the Py/C₆₀/Py nanojunctions for the first time, and the Co electrodes suitable for Co/C₆₀/Co nanojunctions can be successfully fabricated. This study can contribute to the development of molecular nano-spintronics.