  We report the spin current properties in a pigment-red
(perylene-3,4,9,10-tetracarboxylic dianhydride: PTCDA) film prepared by thermal
evaporation. In a palladium(Pd)/PTCDA/Ni80Fe20 tri-layer sample, a pure
spin-current is generated in the PTCDA layer by the spin-pumping of the
Ni80Fe20. The spin current is absorbed into the Pd layer, converted into a
charge current with the inverse spin-Hall effect in Pd, and detected as an
electromotive force. This is clear evidence for the pure spin current in a
PTCDA film, and it is confirmed that a PTCDA film is useful not only as a
robust protection layer material but also as a spintronic material.
