Single Molecule Magnetoresistance with Combined Antiferromagnetic and 
Ferromagnetic Electrodes

Bagrets, A.; Schmaus, S.; Jaafar, A.; Kramczynski, D.; Yamada, T. K.; Alouani, M.; Wulfhekel, W.; Evers, F.

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Single Molecule Magnetoresistance with Combined Antiferromagnetic and Ferromagnetic Electrodes

MPS-Authors

Schmaus, S.
Max Planck Society;

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Alouani, M.
High Magnetic Field Laboratory, Former Departments, Max Planck Institute for Solid State Research, Max Planck Society;

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Citation

Bagrets, A., Schmaus, S., Jaafar, A., Kramczynski, D., Yamada, T. K., Alouani, M., et al. (2012). Single Molecule Magnetoresistance with Combined Antiferromagnetic and Ferromagnetic Electrodes. Nano Letters, 12(10), 5131-5136.

Cite as: https://hdl.handle.net/21.11116/0000-000E-C3A1-F

Abstract

The magnetoresistance of a hydrogen-phthalocyanine molecule placed on an antiferromagnetic Mn(001) surface and contacted by a ferromagnetic Fe electrode is investigated using density functional theory based transport calculations and low-temperature scanning tunneling microscopy. A large and negative magnetoresistance ratio of similar to 50% is observed in combination with a high conductance. The effect originates from a lowest unoccupied molecular orbital (LUMO) doublet placed almost in resonance with the Fermi energy. As a consequence, irrespective of the mutual alignment of magnetizations, electron transport is always dominated by resonant transmission of Mn-majority charge carries going through LUMO levels.