Spin-pump-induced spin transport in a thermally-evaporated pentacene film

TL;DR

This study demonstrates room-temperature spin transport in thermally-evaporated pentacene films via spin-pumping, showing pure spin current generation and detection through inverse spin-Hall effect in a Pd layer.

Contribution

First demonstration of spin-pump-induced spin transport in thermally-evaporated pentacene films at room temperature.

Findings

Pure spin current generated in pentacene by spin-pumping.

Spin current absorbed and converted into charge current in Pd.

Room-temperature spin transport confirmed in evaporated pentacene.

Abstract

We report the spin-pump-induced spin transport properties of a pentacene film prepared by thermal evaporation. In a palladium(Pd)/pentacene/Ni80Fe20 tri-layer sample, a pure spin-current is generated in the pentacene layer by the spin-pumping of Ni80Fe20, which is independent of the conductance mismatch problem in spin injection. 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 at room temperature in pentacene films prepared by thermal evaporation.