Pure spin current in a robust pigment-red film

TL;DR

This study demonstrates the generation and detection of pure spin currents in a PTCDA pigment-red film, highlighting its potential as a robust material for spintronic applications.

Contribution

First experimental evidence of pure spin current in a PTCDA film, expanding the material options for spintronics beyond traditional inorganic compounds.

Findings

Pure spin current generated in PTCDA via spin-pumping.

Spin current absorbed and converted in Pd layer through inverse spin-Hall effect.

PTCDA film confirmed as a viable spintronic material.

Abstract

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.