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Controlling spins in adsorbed molecules by a chemical switch

Author

Listed:
  • Christian Wäckerlin

    (Laboratory for Micro- and Nanotechnology, Paul Scherrer Institut)

  • Dorota Chylarecka

    (Laboratory for Micro- and Nanotechnology, Paul Scherrer Institut)

  • Armin Kleibert

    (Swiss Light Source, Paul Scherrer Institut)

  • Kathrin Müller

    (Laboratory for Micro- and Nanotechnology, Paul Scherrer Institut
    †Present address: Center for Functional Nanomaterials, Brookhaven National Laboratory, Upton, New York 11973, USA.)

  • Cristian Iacovita

    (University of Basel)

  • Frithjof Nolting

    (Swiss Light Source, Paul Scherrer Institut)

  • Thomas A. Jung

    (Laboratory for Micro- and Nanotechnology, Paul Scherrer Institut)

  • Nirmalya Ballav

    (Laboratory for Micro- and Nanotechnology, Paul Scherrer Institut)

Abstract

The development of chemical systems with switchable molecular spins could lead to the architecture of materials with controllable magnetic or spintronic properties. Here, 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)tetraphenylporphyrin (CoTPP) ferromagnetically coupled to nickel thin-film (Ni(001)). On NO addition, the coordination sphere of Co2+ is modified and a NO–CoTPP nitrosyl complex is formed, which corresponds to an off state of the Co spin. Thermal dissociation of 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.

Suggested Citation

  • Christian Wäckerlin & Dorota Chylarecka & Armin Kleibert & Kathrin Müller & Cristian Iacovita & Frithjof Nolting & Thomas A. Jung & Nirmalya Ballav, 2010. "Controlling spins in adsorbed molecules by a chemical switch," Nature Communications, Nature, vol. 1(1), pages 1-7, December.
    • Handle: RePEc:nat:natcom:v:1:y:2010:i:1:d:10.1038_ncomms1057
    DOI: 10.1038/ncomms1057
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