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Magnetic molecules

DoubleDecker_jpgDouble-decker Phthalocyanine molecule

Magnetic molecules form a link between the research fields spintronics and molecular electronics. They offer unique properties like metallic or semiconducting behavior, high magnetic moments, size-induced quantum effects (Kondo effect, Berry phase interference, quantum tunneling of magnetization, etc.) as well as manifold ways of functionalization leading to electric, magnetic, optical, and chemical sensitivities or selective reactions with their environment.

Magnetic molecules can be produced in large quantities with identical properties and may form structured arrangements on substrates due to self-organization. Our aim is to study and design electronic and magnetic interactions of magnetic molecules among each other and with the substrate/contacts. We perform electronic transport measurements through single magnetic molecules or extended chains or islands built from magnetic molecules.

To probe the electronic and magnetic properties with ultrahigh spatial resolution we utilize low temperature spin polarized scanning tunneling microscopy (STM) and spectroscopy (STS) in the Nano-Spintronics-Cluster-Tool, the Joule-Thompson STM, and the LT-Nanoprobe system. Our molecule classes of choice are double-decker phthalocyanines with functionalized ligands, polyoxopalladates, and S-functionalized {Ni4II} complexes that are synthesized in collaboration with the group of Prof. Kögerler (RWTH Aachen)

Dr. Frank Matthes
Dr. Daniel E. Bürgler

Results

1. Accessing 4f-states in single-molecule spintronics
2. Deposition of NdPc2 on differently reactive surfaces


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