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

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

doi:10.1021/acsnano.5b08178

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

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

Department of Physics

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

34 Scopus citations

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.

Original language	English
Pages (from-to)	2887-2892
Number of pages	6
Journal	ACS Nano
Volume	10
Issue number	2
DOIs	https://doi.org/10.1021/acsnano.5b08178
State	Published - 23 Feb 2016

Bibliographical note

Publisher Copyright:
© 2016 American Chemical Society.

Keywords

graphene
magnetic anisotropy
self-assembly
single-ion magnets
single-molecule magnets
surfaces

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10.1021/acsnano.5b08178

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title = "Out-of-Plane Alignment of Er(trensal) Easy Magnetization Axes Using Graphene",

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.",

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author = "Jan Dreiser and Pacchioni, {Giulia E.} and Fabio Donati and Luca Gragnaniello and Alberto Cavallin and Pedersen, {Kasper S.} and Jesper Bendix and Bernard Delley and Marina Pivetta and Stefano Rusponi and Harald Brune",

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doi = "10.1021/acsnano.5b08178",

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AU - Dreiser, Jan

AU - Pacchioni, Giulia E.

AU - Donati, Fabio

AU - Gragnaniello, Luca

AU - Cavallin, Alberto

AU - Pedersen, Kasper S.

AU - Bendix, Jesper

AU - Delley, Bernard

AU - Pivetta, Marina

AU - Rusponi, Stefano

AU - Brune, Harald

PY - 2016/2/23

Y1 - 2016/2/23

N2 - 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.

AB - 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.

KW - graphene

KW - magnetic anisotropy

KW - self-assembly

KW - single-ion magnets

KW - single-molecule magnets

KW - surfaces

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JO - ACS Nano

JF - ACS Nano

IS - 2

ER -

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

Abstract

Bibliographical note

Keywords

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