Spin valve effect in hybrid organic-inorganic device

Spintronics is a new branch of electronics based on purely quantum effects. Instead of carrier's charge transfer as in usual electronics, it evokes carrier's spin transfer. The search of new materials suitable for injecting and transferring carriers with a preferential spin orientation is of paramount importance for the development of Spintronics. We present a direct evidence of polarised spin carrier injection and spin-coherent transfer across organic semiconductor (sexithienyl). Half-metallic manganites posessing spin polarised bands have been used for direct injection into sexithienyl thin films at room temperature. The characteristic length of coherent transfer is nearly 250-300 nm. These results could open the way for the development of a new branch of Spintronics based on organic semiconductors as active transport materials.