Metal-Free Organic Radical Spin Source

Organic radicals have long been suggested as candidates for organic magnets and components in organic spintronic devices. Herein, we demonstrate spin current emission from an organic radical film via spin pumping at room temperature. We present the synthesis and the thin film preparation of a Blatter-type radical with outstanding stability and low roughness. These features enable the fabrication of a radical/ferromagnet bilayer, in which the spin current emission from the organic radical layer can be reversibly reduced when the ferromagnetic film is brought into simultaneous resonance with the radical. The results provide an experimental demonstration of a metal-free organic radical layer operating as a spin source, opening a new avenue for the development of purely organic spintronic devices and bridging the gap between potential and real applications.

Automated summary

In this study, spin current emission from an organic radical film via spin pumping at room temperature was demonstrated. A Blatter-type radical with outstanding stability and low roughness was synthesized and prepared as a thin film. The reversible reduction of spin current emission from the organic radical layer was achieved when brought into simultaneous resonance with a ferromagnetic film. These results provide experimental evidence of a metal-free organic radical layer operating as a spin source, offering possibilities for the development of purely organic spintronic devices and bridging the gap between potential and real applications.