Characterization of the interface interaction of cobalt on top of copper- and iron-phthalocyanine |
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Authors: | Felix Schmitt Jens Sauther Stefan Lach Christiane Ziegler |
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Institution: | 1.Department of Physics and Research Center OPTIMAS,University of Kaiserslautern,Kaiserslautern,Germany |
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Abstract: | The electronic structure of the interface between ferromagnetic cobalt and the organic semiconductors copper- (CuPc) and iron-phthalocyanine
(FePc) was investigated by means of photoemission spectroscopy (UPS, IPES, and XPS). These metal-phthalocyanine (MePc) molecules
have an open shell structure and are known to show promising properties for their use in organic spintronics. In spintronic
devices, the interface between ferromagnetic electrode and the organic layer determines the spin injection properties and
is hence important for the quality of, e.g., a possible spin-valve device. For this purpose, cobalt was deposited onto the
MePcs, such as in devices with ferromagnetic top contacts. The reported investigations reveal a diffusion of cobalt into the
organic layers and chemical reactions at the interface. |
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