Magnetic fingerprint of individual Fe4 molecular magnets under compression by a 
scanning tunnelling microscope

Burgess, Jacob A. J.; Malavolti, Luigi; Lanzilotto, Valeria; Mannini, Matteo; Yan, Shichao; Ninova, Silviya; Totti, Federico; Rolf-Pissarczyk, Steffen; Cornia, Andrea; Sessoli, Roberta; Loth, Sebastian

doi:10.1038/ncomms9216

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Magnetic fingerprint of individual Fe₄ molecular magnets under compression by a scanning tunnelling microscope

MPS-Authors

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Burgess, Jacob A. J.
Dynamics of Nanoelectronic Systems, Independent Research Groups, Max Planck Institute for the Structure and Dynamics of Matter, Max Planck Society;
Max Planck Institute for Solid State Research;

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Malavolti, Luigi
Dynamics of Nanoelectronic Systems, Independent Research Groups, Max Planck Institute for the Structure and Dynamics of Matter, Max Planck Society;
Max Planck Institute for Solid State Research;
Department of Chemistry ‘Ugo Schiff’, University of Florence & INSTM RU of Florence, 50019 Sesto Fiorentino, Italy;

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Yan, Shichao
Dynamics of Nanoelectronic Systems, Independent Research Groups, Max Planck Institute for the Structure and Dynamics of Matter, Max Planck Society;
Max Planck Institute for Solid State Research;

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Rolf-Pissarczyk, Steffen
Dynamics of Nanoelectronic Systems, Independent Research Groups, Max Planck Institute for the Structure and Dynamics of Matter, Max Planck Society;
Max Planck Institute for Solid State Research;

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Loth, Sebastian
Dynamics of Nanoelectronic Systems, Independent Research Groups, Max Planck Institute for the Structure and Dynamics of Matter, Max Planck Society;
Max Planck Institute for Solid State Research;

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http://dx.doi.org/10.1038/ncomms9216
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ncomms9216.pdf
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Citation

Burgess, J. A. J., Malavolti, L., Lanzilotto, V., Mannini, M., Yan, S., Ninova, S., et al. (2015). Magnetic fingerprint of individual Fe₄ molecular magnets under compression by a scanning tunnelling microscope. Nature Communications, 6: 8216. doi:10.1038/ncomms9216.

Cite as: https://hdl.handle.net/11858/00-001M-0000-0028-5BD5-4

Abstract

Single-molecule magnets (SMMs) present a promising avenue to develop spintronic technologies. Addressing individual molecules with electrical leads in SMM-based spintronic devices remains a ubiquitous challenge: interactions with metallic electrodes can drastically modify the SMM’s properties by charge transfer or through changes in the molecular structure. Here, we probe electrical transport through individual Fe₄ SMMs using a scanning tunnelling microscope at 0.5 K. Correlation of topographic and spectroscopic information permits identification of the spin excitation fingerprint of intact Fe₄ molecules. Building from this, we find that the exchange coupling strength within the molecule’s magnetic core is significantly enhanced. First-principles calculations support the conclusion that this is the result of confinement of the molecule in the two-contact junction formed by the microscope tip and the sample surface.