Preparation of lateral spin-valve structure using doped conducting polymer poly(3,4-ethylenedioxythiophene) poly(styrenesulfonate)

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• 作者：Yoshitaka Kawasugi ; ^{kawasugi@mp.es.osaka-u.ac.jp} ; Masato Ara ; Hiroaki Ushirokita ; Takeshi Kamiya ; Hirokazu Tada
• 关键词：Organic spin valve ; Conducting polymer ; Nonlocal magnetoresistance
• 刊名：Organic Electronics
• 出版年：2013
• 出版时间：July, 2013
• 年：2013
• 卷：14
• 期：7
• 页码：1869-1873
• 全文大小：719 K

文摘

To perform four-terminal nonlocal spin-valve measurements on organic spin-valves, we fabricated lateral spin-valve devices consisting of doped conducting polymer poly(3,4-ethylenedioxythiophene) poly(styrenesulfonate) [PEDOT:PSS] and ferromagnetic Ni₈₀Fe₂₀ narrow line (width: 530 nm) electrodes. Although the formula of the nonlocal magnetoresistance with the parameters of doped conducting polymers predicts sufficient nonlocal magnetoresistance, we could not observe any spin signal. The spin diffusion length in the doped PEDOT:PSS device does not appear to be as long as those predicted by both the Elliott-Yafet mechanism and the theory of spin relaxation in organic disordered solids.