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4 results on '"Persichetti, Luca"'

1. Slow Magnetic Relaxation of Dy Adatoms with In-Plane Magnetic Anisotropy on a Two-Dimensional Electron Gas

Author

Bellini, Valerio, primary, Rusponi, Stefano, additional, Kolorenč, Jindřich, additional, Mahatha, Sanjoy K., additional, Valbuena, Miguel Angel, additional, Persichetti, Luca, additional, Pivetta, Marina, additional, Sorokin, Boris V., additional, Merk, Darius, additional, Reynaud, Sébastien, additional, Sblendorio, Dante, additional, Stepanow, Sebastian, additional, Nistor, Corneliu, additional, Gargiani, Pierluigi, additional, Betto, Davide, additional, Mugarza, Aitor, additional, Gambardella, Pietro, additional, Brune, Harald, additional, Carbone, Carlo, additional, and Barla, Alessandro, additional

Published
2022
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2. Complex Magnetic Exchange Coupling between Co Nanostructures and Ni(111) across Epitaxial Graphene

Author

Barla, Alessandro, primary, Bellini, Valerio, additional, Rusponi, Stefano, additional, Ferriani, Paolo, additional, Pivetta, Marina, additional, Donati, Fabio, additional, Patthey, François, additional, Persichetti, Luca, additional, Mahatha, Sanjoy K., additional, Papagno, Marco, additional, Piamonteze, Cinthia, additional, Fichtner, Simon, additional, Heinze, Stefan, additional, Gambardella, Pietro, additional, Brune, Harald, additional, and Carbone, Carlo, additional

Published
2015
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3. Complex Magnetic Exchange Coupling between Co Nanostructures and Ni(111) across Epitaxial Graphene

Author

Barla, Alessandro, Bellini, Valerio, Rusponi, Stefano, Ferriani, Paolo, Pivetta, Marina, Donati, Fabio, Patthey, François, Persichetti, Luca, Mahatha, Sanjoy K., Papagno, Marco, Piamonteze, Cinthia, Fichtner, Simon, Heinze, Stefan, Gambardella, Pietro, Brune, Harald, and Carbone, Carlo

Abstract

We report on the magnetic coupling between isolated Co atoms as well as small Co islands and Ni(111) mediated by an epitaxial graphene layer. X-ray magnetic circular dichroism and scanning tunneling microscopy combined with density functional theory calculations reveal that Co atoms occupy two distinct adsorption sites, with different magnetic coupling to the underlying Ni(111) surface. We further report a transition from an antiferromagnetic to a ferromagnetic coupling with increasing Co cluster size. Our results highlight the extreme sensitivity of the exchange interaction mediated by graphene to the adsorption site and to the in-plane coordination of the magnetic atoms.

Published
2016
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4. Complex Magnetic Exchange Coupling between Co Nanostructures and Ni(111) across Epitaxial Graphene

Author

Stefano Rusponi, Cinthia Piamonteze, Alessandro Barla, Luca Persichetti, Carlo Carbone, P. Ferriani, Fabio Donati, Simon Fichtner, Stefan Heinze, Harald Brune, Marco Papagno, Sanjoy K. Mahatha, François Patthey, Pietro Gambardella, Marina Pivetta, V. Bellini, Barla, Alessandro, Bellini, Valerio, Rusponi, Stefano, Ferriani, Paolo, Pivetta, Marina, Donati, Fabio, Patthey, Françoi, Persichetti, Luca, Mahatha, Sanjoy K., Papagno, Marco, Piamonteze, Cinthia, Fichtner, Simon, Heinze, Stefan, Gambardella, Pietro, Brune, Harald, and Carbone, Carlo

Subjects
Materials science, magnetic exchange interaction, General Physics and Astronomy, 02 engineering and technology, X-ray magnetic circular dichroism (XMCD), 01 natural sciences, law.invention, Physics and Astronomy (all), Condensed Matter::Materials Science, Engineering (all), density functional theory (DFT), law, 0103 physical sciences, Physics::Atomic and Molecular Clusters, Antiferromagnetism, General Materials Science, Density functional theory (DFT), 010306 general physics, Graphene, Magnetic exchange interaction, Scanning tunneling microscopy (STM), Materials Science (all), Settore FIS/03, Condensed matter physics, Magnetic circular dichroism, scanning tunneling microscopy (STM), Exchange interaction, graphene, General Engineering, 021001 nanoscience & nanotechnology, equipment and supplies, Inductive coupling, Ferromagnetism, Density functional theory, Scanning tunneling microscope, 0210 nano-technology, human activities
Abstract

We report on the magnetic coupling between isolated Co atoms as well as small Co islands and Ni(111) mediated by an epitaxial graphene layer. X-ray magnetic circular dichroism and scanning tunneling microscopy combined with density functional theory calculations reveal that Co atoms occupy two distinct adsorption sites, with different magnetic coupling to the underlying Ni(111) surface. We further report a transition from an antiferromagnetic to a ferromagnetic coupling with increasing Co cluster size. Our results highlight the extreme, sensitivity of the exchange interaction mediated by graphene to the adsorption site and to the in-plane coordination of the magnetic atoms.

Published
2015
Full Text
View/download PDF

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