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

作者：Kawasugi Yoshitaka^*; Ara Masato; Ushirokita Hiroaki; Kamiya Takeshi; Tada Hirokazu

来源：Organic Electronics, 2013, 14(7): 1869-1873.

DOI：10.1016/j.orgel.2013.04.026

• Organic spin valve
• Conducting polymer
• Nonlocal magnetoresistance

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.

• 出版日期2013-7