Dresden 2014 – wissenschaftliches Programm

Bereiche | Tage | Auswahl | Suche | Aktualisierungen | Downloads | Hilfe

DS: Fachverband Dünne Schichten

DS 4: Magnetic / Organic Interfaces, Spins in Organics and Molecular Magnetism (jointly with MA)

DS 4.8: Vortrag

Montag, 31. März 2014, 17:00–17:15, CHE 91

Detailed analysis of sharp nonreactive interface formation in soft-landing conditions: ferromagnetic metallic top contacts onto model wide-gap organic semiconductor using rare-gas condensed at 30K. — •Sergey Babenkov¹, Olga Molodtsova¹, Jens Viefhaus¹, Matthias Kalläne², Eric Kröger², Arndt Quer², Cristoph Seibel⁴, Frank Scholz¹, Jörn Seltmann¹, Leif Glaser¹, and Victor Aristov^1,3 — ¹DESY, Hamburg, Germany — ²CAU, Kiel, Germany — ³ISSP RAS, Chernogolovka, Russia — ⁴UW, Würzburg, Germany

The present work studies the formation of sharp non-reactive metal-organic interfaces at soft landing conditions. In previous work it has been shown that at low coverage of Fe on copper-phthalocyanine (CuPc) there is a strong chemical reaction under room temperature (RT) conditions. In contrast, the results of investigation of size selected clusters in condensed rare gas matrices show almost no diffusion or agglomeration of metal atoms into the organic substrate. In our present investigation by XPS using the PETRA III synchrotron radiation facility at DESY, the formation of interfaces between well-ordered thin film of CuPc with iron and nickel at room and low temperatures (LT) and in condensed Xe matrix were studied. The observed XPS spectra show a strong chemical reaction of the metal with the organic film at RT conditions both for iron and for nickel while at LT with Xe a sharp non-reactive interface formation is observed. This sharp metal-organic interface formation obtained at soft landing conditions can be used for spin injection in spintronic devices.