Speaker
Mr
Jan Nowakowski
(Laboratory for Micro and Nanotechnology, Paul Scherrer Institut)
Description
Using X-ray magnetic circular dichroism (XMCD), we present conclusive evidence that the spin of an organometallic molecule coupled to a ferromagnetic substrate can be switched between magnetic off and on states by a chemical stimulus. This is achieved by nitric oxide (NO) functioning as an axial ligand of cobalt(II) tetraphenyl-porphyrin (CoTPP) ferromagnetically coupled to nickel thin-film (Ni(001)). On NO addition, the coordination sphere of Co is modified and a NO–CoTPP nitrosyl complex is formed, which corresponds to an off state of the Co spin. Thermal dissociation of the NO from the nitrosyl complex restores the on state of the Co spin. The NO-induced reversible off–on switching of surface-adsorbed molecular spins observed here is attributed to a spin trans effect.
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Poster
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Surface Science, Materials Science, X-ray spectroscopy
Primary author
Mr
Jan Nowakowski
(Laboratory for Micro and Nanotechnology, Paul Scherrer Institut)
Co-authors
Dr
Armin Kleibert
(Swiss Light Source, Paul Scherrer Institut)
Mr
Christian Wäckerlin
(Laboratory for Micro and Nanotechnology, Paul Scherrer Institut)
Dr
Cristian Iacovita
(Department of Physics, University of Basel)
Ms
Dorota Chylarecka
(Laboratory for Micro and Nanotechnology, Paul Scherrer Institut)
Prof.
Frithjof Nolting
(Swiss Light Source, Paul Scherrer Institut)
Dr
Kartick Tarafder
(Department of Physics and Astronomy, Uppsala University)
Dr
Kathrin Müller
(Laboratory for Micro and Nanotechnology, Paul Scherrer Institut)
Dr
Nirmalya Ballav
(Indian Institute of Science Education and Research (IISER) Pune)
Prof.
Peter M. Oppeneer
(Department of Physics and Astronomy, Uppsala University)
Prof.
Thomas A. Jung
(Laboratory for Micro and Nanotechnology, Paul Scherrer Institut)
