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On-Surface Magnetometry: The Evaluation of Superexchange Coupling Constants in Surface-Wired Single-Molecule Magnets

Authors

  • Dr. Erik Tancini,

    1. Dipartimento di Scienze Chimiche e Geologiche & UdR INSTM, Università di Modena e Reggio Emilia via G. Campi 183, 41125 Modena (Italy), Fax: (+39) 059-373543
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  • Dr. Matteo Mannini,

    1. Dipartimento di Chimica ‘Ugo Schiff' & UdR INSTM, Università di Firenze, 50019 Sesto Fiorentino (Italy)
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  • Dr. Philippe Sainctavit,

    1. IMPMC-CNRS UMR 7590, Université Pierre et Marie Curie, 75252 Paris Cedex 5 (France)
    2. Synchrotron SOLEIL, L'Orme des Merisiers, Saint Aubin BP48, 91192 Gif-sur-Yvette Cedex (France)
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  • Dr. Edwige Otero,

    1. Synchrotron SOLEIL, L'Orme des Merisiers, Saint Aubin BP48, 91192 Gif-sur-Yvette Cedex (France)
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  • Prof. Dr. Roberta Sessoli,

    1. Dipartimento di Chimica ‘Ugo Schiff' & UdR INSTM, Università di Firenze, 50019 Sesto Fiorentino (Italy)
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  • Prof. Dr. Andrea Cornia

    Corresponding author
    1. Dipartimento di Scienze Chimiche e Geologiche & UdR INSTM, Università di Modena e Reggio Emilia via G. Campi 183, 41125 Modena (Italy), Fax: (+39) 059-373543
    • Dipartimento di Scienze Chimiche e Geologiche & UdR INSTM, Università di Modena e Reggio Emilia via G. Campi 183, 41125 Modena (Italy), Fax: (+39) 059-373543

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Abstract

original image

A comfortable environment: Interaction with a gold surface fully preserves the spin structure of a Fe3Cr single-molecule magnet of current interest in molecular spintronics. Magnetic polarization at metal sites is measured over a broad temperature range (from 10 to 300 K) by X-ray magnetic circular dichroism (XMCD), which provides the required monolayer sensitivity. The data are used to evaluate Fe[BOND]Cr superexchange coupling interactions, which compare well with bulk-phase values in both sign and strength (see figure).

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