Spin transport in an organic semiconductor single crystal by using micro spin-pumping

2014 Fiscal Year Final Research Report

• Project/Area Number: 25600010
• Research Category: Grant-in-Aid for Challenging Exploratory Research
• Allocation Type: Multi-year Fund
• Research Field: Nanostructural physics
• Research Institution: Tohoku University
• Principal Investigator: SEKI Takeshi 東北大学, 金属材料研究所, 助教 (40579611)
• Co-Investigator(Renkei-kenkyūsha): ONO Shimpei (一財)電力中央研究所, 材料科学研究所, 主任研究員 (30371298) ; KOHDA Makoto 東北大学, 工学研究科, 准教授 (00420000)
• Project Period (FY): 2013-04-01 – 2015-03-31
• Keywords: スピンデバイス / 有機スピントロニクス / 磁化ダイナミクス

Outline of Final Research Achievements

The purpose of this research project is to develop spintronic devices utilizing organic semiconductor single crystals basically consisting of carbon which is an ubiquitous element. We used a micro spin-pumping method as a technique to inject spins into organic semiconductors and nonmagnetic metals, and the injection, the transport and the detection of spins were examined experimentally. We successfully controlled the magnetization dynamics in the microfabricated magnetic element, and injected spins into the Cu nanowire due to the micro spin-pumping. We also observed the change in the spin accumulation in Cu by attaching the Pt wire with Cu. In addition, we fabricated the device with the junction of Rubrene single crystal and ferromagnetic electrode, and evaluated the magnetization dynamics under the gate voltage application.

Free Research Field

磁性材料学