Direct Evidence Of Electron Spin Polarization From An Organic-Based Magnet: [Fe-Ii(Tcne)(Ncme)(2)][(Fecl4)-Cl-Iii]

Direct evidence of an organic-based magnet with a finite electron spin polarization at the Fermi edge is shown from spin-resolved photoemission of the [Fe-II(TCNE)(NCMe)(2)][(FeCl4)-Cl-III] organic-based magnet. The 23% majority-based spin polarization at the Fermi edge is observed at 80 K in zero applied field. Ab initio calculations at the density functional level (0 K) are in accord with a semiconductor with 100% majority-based electron spin polarization at the band edges, commensurate with our experimental results and model prediction for a half-semiconductor. Organic-based magnets may prove to be important for realizing polarized electron injection into semiconductors for magnetoelectronic applications.