Tailoring the magnetism of Co atoms on graphene through substrate hybridization

F. Donati; L. Gragnaniello; A. Cavallin; F. D. Natterer; Q. Dubout; M. Pivetta; F. Patthey; J. Dreiser; C. Piamonteze; S. Rusponi; H. Brune

doi:10.1103/PhysRevLett.113.177201

Tailoring the magnetism of Co atoms on graphene through substrate hybridization

F. Donati, L. Gragnaniello, A. Cavallin, F. D. Natterer, Q. Dubout, M. Pivetta, F. Patthey, J. Dreiser, C. Piamonteze, S. Rusponi, H. Brune

Department of Physics

Research output: Contribution to journal › Article › peer-review

65 Scopus citations

Abstract

We determine the magnetic properties of individual Co atoms adsorbed on graphene (G) with x-ray absorption spectroscopy and magnetic circular dichroism. The magnetic ground state of Co adatoms strongly depends on the choice of the metal substrate on which graphene is grown. Cobalt atoms on G/Ru(0001) feature exceptionally large orbital and spin moments, as well as an out-of-plane easy axis with large magnetic anisotropy. Conversely, the magnetic moments are strongly reduced for Co/G/Ir(111), and the magnetization is of the easy-plane type. We demonstrate how the Co magnetic properties, which ultimately depend on the degree of hybridization between the Co 3d orbitals and graphene π bands, can be tailored through the strength of the graphene-substrate coupling.

Original language	English
Article number	177201
Journal	Physical Review Letters
Volume	113
Issue number	17
DOIs	https://doi.org/10.1103/PhysRevLett.113.177201
State	Published - 20 Oct 2014

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© 2014 American Physical Society.

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abstract = "We determine the magnetic properties of individual Co atoms adsorbed on graphene (G) with x-ray absorption spectroscopy and magnetic circular dichroism. The magnetic ground state of Co adatoms strongly depends on the choice of the metal substrate on which graphene is grown. Cobalt atoms on G/Ru(0001) feature exceptionally large orbital and spin moments, as well as an out-of-plane easy axis with large magnetic anisotropy. Conversely, the magnetic moments are strongly reduced for Co/G/Ir(111), and the magnetization is of the easy-plane type. We demonstrate how the Co magnetic properties, which ultimately depend on the degree of hybridization between the Co 3d orbitals and graphene π bands, can be tailored through the strength of the graphene-substrate coupling.",

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AU - Donati, F.

AU - Gragnaniello, L.

AU - Cavallin, A.

AU - Natterer, F. D.

AU - Dubout, Q.

AU - Pivetta, M.

AU - Patthey, F.

AU - Dreiser, J.

AU - Piamonteze, C.

AU - Rusponi, S.

AU - Brune, H.

PY - 2014/10/20

Y1 - 2014/10/20

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AB - We determine the magnetic properties of individual Co atoms adsorbed on graphene (G) with x-ray absorption spectroscopy and magnetic circular dichroism. The magnetic ground state of Co adatoms strongly depends on the choice of the metal substrate on which graphene is grown. Cobalt atoms on G/Ru(0001) feature exceptionally large orbital and spin moments, as well as an out-of-plane easy axis with large magnetic anisotropy. Conversely, the magnetic moments are strongly reduced for Co/G/Ir(111), and the magnetization is of the easy-plane type. We demonstrate how the Co magnetic properties, which ultimately depend on the degree of hybridization between the Co 3d orbitals and graphene π bands, can be tailored through the strength of the graphene-substrate coupling.

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Tailoring the magnetism of Co atoms on graphene through substrate hybridization

Abstract

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