Magnetic Coupling of Porphyrin Molecules Through Graphene
| Autor: | Alex Krüger, Matthias Bernien, Wolfgang Kuch, Yin-Ming Chang, Peter M. Oppeneer, C. F. Hermanns, Kartick Tarafder |
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| Rok vydání: | 2013 |
| Předmět: |
Materials science
FOS: Physical sciences Physics::Optics law.invention Condensed Matter::Materials Science Magnetization Paramagnetism chemistry.chemical_compound Nuclear magnetic resonance law Mesoscale and Nanoscale Physics (cond-mat.mes-hall) Physics::Atomic and Molecular Clusters Molecule General Materials Science Physics::Chemical Physics Condensed Matter - Materials Science Condensed Matter - Mesoscale and Nanoscale Physics Condensed Matter::Other Graphene Magnetic circular dichroism Mechanical Engineering Materials Science (cond-mat.mtrl-sci) Porphyrin Inductive coupling Crystallography chemistry Mechanics of Materials Density functional theory |
| Zdroj: | Advanced Materials. 25:3473-3477 |
| ISSN: | 1521-4095 0935-9648 |
| Popis: | Graphene is expected to complement todays Si-based information technology. In particular, magnetic molecules in contact with graphene constitute a tantalizing approach towards organic spin electronics because of the reduced conductivity mismatch at the interface. In such a system a bit is represented by a single molecular magnetic moment, which must be stabilized against thermal fluctuations. Here, we show in a combined experimental and theoretical study that the moments of paramagnetic Co-octaethylporphyrin (CoOEP) molecules on graphene can be aligned by a remarkable antiferromagnetic coupling to a Ni substrate underneath the graphene. This coupling is mediated via the \pi\ electronic system of graphene, while no covalent bonds between the molecule and the substrate are established. Comment: 27 pages, 12 figures, Accepted at Adv. Mater |
| Databáze: | OpenAIRE |
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