Bulletin of the American Physical Society
APS March Meeting 2019
Volume 64, Number 2
Monday–Friday, March 4–8, 2019; Boston, Massachusetts
Session P38: 2D Magnetism III
2:30 PM–5:30 PM,
Wednesday, March 6, 2019
BCEC
Room: 206B
Sponsoring
Units:
GMAG DMP
Chair: Roopali Kukreja, University of California, Davis
Abstract: P38.00005 : Organization and magnetic properties of mass-selected FePt nanoparticles deposited on epitaxially grown graphene on Ir(111)
3:42 PM–4:18 PM
View Presentation Abstract
Presenter:
Florent Tournus
(Institut Lumière Matière, Université Lyon 1-CNRS)
Authors:
Florent Tournus
(Institut Lumière Matière, Université Lyon 1-CNRS)
Pierre Capiod
(Institut Lumière Matière, Université Lyon 1-CNRS)
Laurent Bardotti
(Institut Lumière Matière, Université Lyon 1-CNRS)
Alexandre Tamion
(Institut Lumière Matière, Université Lyon 1-CNRS)
Veronique Dupuis
(Institut Lumière Matière, Université Lyon 1-CNRS)
Gilles Renaud
(INAC, Univ. Grenoble Alpes - CEA)
Philippe Ohresser
(Synchrotron SOLEIL)
FePt/graphene/Ir(111) samples have been prepared using Low Energy Cluster Beam Deposition [3] of preformed size-selected FePt nanoparticles (around 2 nm diameter). We will discuss the organization of such particles on specific sites of the moiré lattice, as determined by grazing incidence x-ray scattering measurements [4]. The deposited nanoparticles are sensitive to the moiré pattern and we find that the resulting organization can be preserved up to temperatures around 700°C. Using X-ray Magnetic Circular Dichroism measurements, we will report a clear evolution of the magnetic properties of the FePt nanoparticles induced by annealing (anisotropy modification, interface effects between FePt and the graphene...), while the particles keep their individuality (no layer formation is observed).
[1] P. Andreazza et al., Surface Science Reports 70, 188 (2015)
[2] A. T. N’Diaye et al., New Journal of Physics 10, 043033 (2008)
[3] V. Dupuis et al., Phys. Chem. Chem. Phys. 17, 27996 (2015)
[4] S. Linas et al., Scientific Reports 5, 13053 (2015)
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