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Dreiser J, Pacchioni GE, Donati F, et al. Out-of-Plane Alignment of Er(trensal) Easy Magnetization Axes Using Graphene. ACS Nano. 2016;10(2):2887-92doi: 10.1021/acsnano.5b08178.
Dreiser, J., Pacchioni, G. E., Donati, F., Gragnaniello, L., Cavallin, A., Pedersen, K. S., Bendix, J., Delley, B., Pivetta, M., Rusponi, S., & Brune, H. (2016). Out-of-Plane Alignment of Er(trensal) Easy Magnetization Axes Using Graphene. ACS nano, 10(2), 2887-92. https://doi.org/10.1021/acsnano.5b08178
Dreiser, Jan, et al. "Out-of-Plane Alignment of Er(trensal) Easy Magnetization Axes Using Graphene." ACS nano vol. 10,2 (2016): 2887-92. doi: https://doi.org/10.1021/acsnano.5b08178
Dreiser J, Pacchioni GE, Donati F, Gragnaniello L, Cavallin A, Pedersen KS, Bendix J, Delley B, Pivetta M, Rusponi S, Brune H. Out-of-Plane Alignment of Er(trensal) Easy Magnetization Axes Using Graphene. ACS Nano. 2016 Feb 23;10(2):2887-92. doi: 10.1021/acsnano.5b08178. Epub 2016 Feb 08. PMID: 26814851.
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ACS Nano. 2016 Feb 23;10(2):2887-92. doi: 10.1021/acsnano.5b08178. Epub 2016 Feb 08.

Out-of-Plane Alignment of Er(trensal) Easy Magnetization Axes Using Graphene.

ACS nano

Jan Dreiser, Giulia E Pacchioni, Fabio Donati, Luca Gragnaniello, Alberto Cavallin, Kasper S Pedersen, Jesper Bendix, Bernard Delley, Marina Pivetta, Stefano Rusponi, Harald Brune

Affiliations

  1. Institute of Physics, Ecole Polytechnique Fédérale de Lausanne , 1015 Lausanne, Switzerland.
  2. CNRS, CRPP, UPR 8641 and CNRS, ICMCB, UPR 9014, 33600 Pessac, France.
  3. Department of Chemistry, University of Copenhagen , 2100 Copenhagen, Denmark.

PMID: 26814851 DOI: 10.1021/acsnano.5b08178

Abstract

We have studied Er(trensal) single-ion magnets adsorbed on graphene/Ru(0001), on graphene/Ir(111), and on bare Ru(0001) by scanning tunneling microscopy and X-ray absorption spectroscopy. On graphene, the molecules self-assemble into dense and well-ordered islands with their magnetic easy axes perpendicular to the surface. In contrast, on bare Ru(0001), the molecules are disordered, exhibiting only weak directional preference of the easy magnetization axis. The perfect out-of-plane alignment of the easy axes on graphene results from the molecule-molecule interaction, which dominates over the weak adsorption on the graphene surface. Our results demonstrate that the net magnetic properties of a molecular submonolayer can be tuned using a graphene spacer layer, which is attractive for hybrid molecule-inorganic spintronic devices.

Keywords: graphene; magnetic anisotropy; self-assembly; single-ion magnets; single-molecule magnets; surfaces

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