Magneto-transport in ferromagnetic contacted organic layers

Organic semiconductors – with molecular or polymeric structures – are prospective materials for large-area electronics, for low-temperature processing and economical thin-film device fabrication. They are also characterized by weak spin-orbit coupling and hyperfine interaction, so that the electron spin diffusion length is large in comparison with conventional metals and semiconductors. These properties make the organic semiconductors to a promising material for using in spin-valves.

We prepare ferromagnetic sandwich structures with organic spacer layers and study the spin-dependent electronic transport properties.

Activities

• Preparation of metal/organic layered structures by combination of effusion cell technique,  electron beam evaporation, magnetron-sputtering and spin-coating

• in situ-patterning of transport-measuring samples by shadowing mask technique as well as application of photolithographic pre-defined contact arrays

• Magneto-transport and magnetization measurements at 4.2K<T<300K