Here we give an overview of how a spin-polarized metastable helium beam may be used to characterize surfaces and interfaces relevant to spin injection from a ferromagnetic (FM) electrode to an organic semiconductor (OSC). Taking advantage of the extreme surface sensitivity of this technique, we show how information regarding the electronic and magnetic properties of FM/OSC interfaces may be obtained. We demonstrate how the spin polarization at the surface of a FM oxide―Fe3O4(001)―may be drastically enhanced through atomic adsorption. We also investigate the adsorption of copper phthalocyanine (CuPc) on Fe3O4(001) revealing that the CuPc molecular orbitals are spin polarized due to the magnetic interaction with the substrate, even for a relatively thick film of 5 nm.
- Spin polarization
- Molecular spintronics
- Organic semiconductors
- Copper phthalocyanine
- Spin-polarized metastable helium