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Enhanced Magnetic Hybridization of a Spinterface through Insertion of a Two-Dimensional Magnetic Oxide Layer

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http://pubman.mpdl.mpg.de/cone/persons/resource/persons200439

Berti,  Giulia
Dipartimento di Fisica, Politecnico di Milano;
Chemical Physics, Fritz Haber Institute, Max Planck Society;

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Zitation

Brambilla, A., Picone, A., Giannotti, D., Calloni, A., Berti, G., Bussetti, G., et al. (2017). Enhanced Magnetic Hybridization of a Spinterface through Insertion of a Two-Dimensional Magnetic Oxide Layer. Nano Letters, 17(12), 7440-7446. doi:10.1021/acs.nanolett.7b03314.


Zitierlink: http://hdl.handle.net/21.11116/0000-0000-75AB-C
Zusammenfassung
Interfaces between organic semiconductors and ferromagnetic metals offer intriguing opportunities in the rapidly developing field of organic spintronics. Understanding and controlling the spin-polarized electronic states at the interface is the key toward a reliable exploitation of this kind of systems. Here we propose an approach consisting in the insertion of a two-dimensional magnetic oxide layer at the interface with the aim of both increasing the reproducibility of the interface preparation and offering a way for a further fine control over the electronic and magnetic properties. We have inserted a two-dimensional Cr4O5 layer at the C60/Fe(001) interface and have characterized the corresponding morphological, electronic, and magnetic properties. Scanning tunneling microscopy and electron diffraction show that the film grows well-ordered both in the monolayer and multilayer regimes. Electron spectroscopies confirm that hybridization of the electronic states occurs at the interface. Finally, magnetic dichroism in X-ray absorption shows an unprecedented spin-polarization of the hybridized fullerene states. The latter result is discussed also in light of an ab initio theoretical analysis.