Spin Tuning of Electron-Doped Metal-Phthalocyanine Layers (Articolo in rivista)

Type
Label
  • Spin Tuning of Electron-Doped Metal-Phthalocyanine Layers (Articolo in rivista) (literal)
Anno
  • 2014-01-01T00:00:00+01:00 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#doi
  • 10.1021/ja501204q (literal)
Alternative label
  • Sebastian Stepanow, Alberto Lodi Rizzini, Cornelius Krull, Jerald Kavich, Julio C. Cezar, Flora Yakhou-Harris, Polina M. Sheverdyaeva, Paolo Moras, Carlo Carbone, Gustavo Ceballos, Aitor Mugarza, Pietro Gambardella (2014)
    Spin Tuning of Electron-Doped Metal-Phthalocyanine Layers
    in Journal of the American Chemical Society (Print)
    (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
  • Sebastian Stepanow, Alberto Lodi Rizzini, Cornelius Krull, Jerald Kavich, Julio C. Cezar, Flora Yakhou-Harris, Polina M. Sheverdyaeva, Paolo Moras, Carlo Carbone, Gustavo Ceballos, Aitor Mugarza, Pietro Gambardella (literal)
Pagina inizio
  • 5451 (literal)
Pagina fine
  • 5459 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroVolume
  • 136 (literal)
Rivista
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroFascicolo
  • 14 (literal)
Note
  • Scopu (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni
  • Department of Materials, ETH Zürich, Hönggerbergring 64, 8093 Zürich, Switzerland Catalan Institute of Nanoscience and Nanotechnology, UAB Campus, 08193 Barcelona, Spain European Synchrotron Radiation Facility, BP 220, 38043 Grenoble, France Istituto di Struttura della Materia, Consiglio Nazionale delle Ricerche, 34012 Trieste, Italy (literal)
Titolo
  • Spin Tuning of Electron-Doped Metal-Phthalocyanine Layers (literal)
Abstract
  • The spin state of organic-based magnets at interfaces is to a great extent determined by the organic environment and the nature of the spin-carrying metal center, which is further subject to modifications by the adsorbate-substrate coupling. Direct chemical doping offers an additional route for tailoring the electronic and magnetic characteristics of molecular magnets. Here we present a systematic investigation of the effects of alkali metal doping on the charge state and crystal field of 3d metal ions in Cu, Ni, Fe, and Mn phthalocyanine (Pc) monolayers adsorbed on Ag. Combined X-ray absorption spectroscopy and ligand field multiplet calculations show that Cu(II), Ni(II), and Fe(II) ions reduce to Cu(I), Ni(I), and Fe(I) upon alkali metal adsorption, whereas Mn maintains its formal oxidation state. The strength of the crystal field at the Ni, Fe, and Mn sites is strongly reduced upon doping. The combined effect of these changes is that the magnetic moment of high- and low-spin ions such as Cu and Ni can be entirely turned off or on, respectively, whereas the magnetic configuration of MnPc can be changed from intermediate (3/2) to high (5/2) spin. In the case of FePc a 10-fold increase of the orbital magnetic moment accompanies charge transfer and a transition to a high-spin state. (literal)
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