Regensburg 2016 – wissenschaftliches Programm
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MA: Fachverband Magnetismus
MA 33: Surface Magnetism II (jointly with O)
MA 33.7: Vortrag
Mittwoch, 9. März 2016, 16:45–17:00, H31
Spin Excitation Spectroscopy on Fe4 Molecular Magnets Compressed in the Junction of a Scanning Tunneling Microscopy — •Jacob Burgess1,2, Luigi Malavolti1,2,3, Valeria Lanzilotto3, Matteo Mannini3, Shichao Yan1,2, Silviya Ninova3, Federico Totti3, Steffen Rolf-Pissarczyk1,2, Andrea Cornia4, Roberta Sessoli3, and Sebastian Loth1,2 — 1Max-Planck Institut für Struktur und Dynamik der Materie — 2Max-Planck Institut für Festkörperforschung — 3Department of Chemistry Ugo Schiff, University of Florence & INSTM RU of Florence — 4Department of Chemical and Geological Sciences, University of Modena and Reggio Emilia & INSTM RU of Modena and Reggio Emilia
Here we present inelastic tunneling spectroscopy measurements on individual Fe4 single magnetic molecules. Magnetic excitations at meV energies can be detected. Strong tip interactions are inherent in the measurement and present an experimental challenge. This necessitates the use of a correlation between excitation energy and general topography to identify intact molecules. The spectra of intact molecules indicate that the intramolecular exchange interaction is boosted significantly when compared to bulk molecular crystals. Ab initio calculations show that this can be explained by a minimal tip induced compression of the molecular core[1]. Fe4 remains suitable for spintronics applications when incorporated into prototype device and may have its magnetic properties tuned by mechanical interactions.
[1] J.A.J. Burgess et al., Nature Communications 6, 8216 (2015).