Elaboration of nanomagnet arrays: organization and magnetic properties of mass-selected FePt nanoparticles deposited on epitaxially grown graphene on Ir(111) - Archive ouverte HAL Access content directly
Journal Articles Physical Review Letters Year : 2019

Elaboration of nanomagnet arrays: organization and magnetic properties of mass-selected FePt nanoparticles deposited on epitaxially grown graphene on Ir(111)

Laurent Bardotti
Alexandre Tamion
Olivier Boisron
Clément Albin
Veronique Dupuis
Gilles Renaud
Philippe Ohresser
Florent Tournus

Abstract

The moiré pattern created by the epitaxy of a graphene sheet on an iridium substrate can be used as a template for the growth of 2D atomic or cluster arrays. We observed for the first time a coherent organization of hard magnetic preformed FePt nanoparticles on the 2D lattice of graphene/Ir(111). Nanoparticles of 2 nm diameter have been mass-selected in gas phase and deposited with a low energy on the hexagonal moiré pattern. Their morphology and organization have been investigated using Grazing Incidence Small Angle X-ray Scattering, while their magnetic properties have been studied by X-ray Magnetic Circular Dichroism, both pointing to a FePt cluster/graphene surface specific interaction. The spatial coherence of the nanoparticles is preserved upon annealing up to 700°C where the hard magnetic phase of FePt is obtained.
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Dates and versions

hal-02107539 , version 1 (23-04-2019)

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Pierre Capiod, Laurent Bardotti, Alexandre Tamion, Olivier Boisron, Clément Albin, et al.. Elaboration of nanomagnet arrays: organization and magnetic properties of mass-selected FePt nanoparticles deposited on epitaxially grown graphene on Ir(111). Physical Review Letters, 2019, 122 (10), pp.106802. ⟨10.1103/PhysRevLett.122.106802⟩. ⟨hal-02107539⟩
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