Antiferromagnetic coupling of Cr-porphyrin to a bare Co substrate

Girovsky, Jan and Tarafder, Kartick and Waeckerlin, Christian and Nowakowski, Jan and Siewert, Dorota and Haehlen, Tatjana and Waeckerlin, Aneliia and Kleibert, Armin and Ballav, Nirmalya and Jung, Thomas A. and Oppeneer, Peter M.. (2014) Antiferromagnetic coupling of Cr-porphyrin to a bare Co substrate. Physical Review B, 90 (22). 220404(R).

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We report the discovery of an antiferromagnetic coupling of the magnetic moment of chromium(II) tetraphenyl-porphyrin (CrTPP) molecules to the magnetization of the clean ferromagnetic Co(001) substrate. We assign this unusual molecule-substrate exchange coupling to the less than half-filled chromium 3d orbitals interacting with Co valence band electrons via porphyrin-ligand molecular orbitals. X-ray magnetic circular dichroism, x-ray photoelectron spectroscopy, and scanning tunneling microscopy are combined with DFT+U calculations and provide evidence for a surprising type of antiferromagnetic 90∘ indirect magnetic exchange coupling.
Faculties and Departments:05 Faculty of Science > Departement Physik > Physik
05 Faculty of Science > Departement Physik > Physik > Nanomechanik (Meyer)
UniBasel Contributors:Jung, Thomas A.
Item Type:Article, refereed
Article Subtype:Research Article
Publisher:American Physical Society
Note:Publication type according to Uni Basel Research Database: Journal article
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Last Modified:10 May 2017 10:33
Deposited On:03 Nov 2016 07:48

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