[21a-P02-1~50] 10 Spintronics and Magnetics(Poster)

[21a-P02-9] Spin transport property in naphthyl diamine derivative films by using the spin pumping

Yuichiro Onishi¹, Yoshio Teki^2,3, 〇Eiji Shikoh^1,3 (1.Osaka City Univ., Eng., 2.Osaka City Univ., Sci., 3.Osaka Metropolitan Univ., Eng.)

Keywords:spintronics, spin pumping, naphthyl diamine derivative

We report the spin transport properties in naphthyl diamine derivative (alpha-NPD) thin films prepared by thermal evaporation. In a palladium(Pd)/alpha-NPD/Ni₈₀Fe₂₀ tri-layer sample, a pure spin-current is generated in the alpha-NPD layer by the spin-pumping driven by the ferromagnetic resonance of the Ni₈₀Fe₂₀ layer. The spin current is absorbed into the Pd layer, converted into a charge current with the inverse spin-Hall effect (ISHE) in the Pd layer, and detected as an electromotive force (EMF) via the resistance of the Pd layer. This is clear evidence for the pure spin-current in thermally-evaporated alpha-NPD films at room temperature.