Dresden 2017 – wissenschaftliches Programm
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O: Fachverband Oberflächenphysik
O 33: Nanostructures at Surfaces: Metals, Oxides and Semiconductors I
O 33.7: Vortrag
Dienstag, 21. März 2017, 12:00–12:15, REC/PHY C213
Ultra small iron nanoparticle superlattice on graphene/iridium(111) — •Konstantin Krausert1,2, Elin Grånäs1, Arti Dangwal Pandey1, Heshmat Noei1, Dirk Franz1,2, and Andreas Stierle1,2 — 1DESY NanoLab, Notkestraße 85, D-22607 Hamburg — 2University of Hamburg, D-20355 Hamburg
The physical properties, such as magnetism of ultra small clusters can differ fundamentally from the bulk material and are dominated by their confinement and atomic structure [1, 2]. The arrangement of such nanoparticles in a superlattice not only allows to reach high density and possibly trigger intercluster effects, but it also enables new characterization approaches [2].
Iridium seeded ultra small Fe nanoparticle superlattices were grown on graphene on Ir(111) support [1]. These are studied with various measurement techniques to gain and correlate structural, electronic and magnetic information. The bottom up fabrication is reproducible and gives the oportunity to link different structural characterisation from scanning probe techniques to electron and x-ray diffraction (XRD) measurements. The regular arrangements of the clusters also enables an atomical scale XRD characterisation [2]. Growth on thin film Ir substrates [3] and well defined coverage widens the charaterisation possibilties for ex situ and magnetic measurements. The present findings in the project and an outlook will be given in the talk.
[1] A. T. N'Diaye, et al, New Journal of Physics 11, 103045 (2009) [2] D. Franz, et al, Phys. Rev. B 93, 045426 (2016) [3] A. Dangwal Pandey, et al, J. Appl. Phys. 120, 075304 (2016)