Superlattice of Single Atom Magnets on Graphene

Romana Baltic; Marina Pivetta; Fabio Donati; Christian Wäckerlin; Aparajita Singha; Jan Dreiser; Stefano Rusponi; Harald Brune

doi:10.1021/acs.nanolett.6b03543

Superlattice of Single Atom Magnets on Graphene

Romana Baltic, Marina Pivetta, Fabio Donati, Christian Wäckerlin, Aparajita Singha, Jan Dreiser, Stefano Rusponi, Harald Brune

Department of Physics

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

90 Scopus citations

Abstract

Regular arrays of single atoms with stable magnetization represent the ultimate limit of ultrahigh density storage media. Here we report a self-assembled superlattice of individual and noninteracting Dy atoms on graphene grown on Ir(111), with magnetic hysteresis up to 5.6 T and spin lifetime of 1000 s at 2.5 K. The observed magnetic stability is a consequence of the intrinsic low electron and phonon densities of graphene and the 6-fold symmetry of the adsorption site. Our array of single atom magnets has a density of 115 Tbit/inch², defined by the periodicity of the graphene moiré pattern.

Original language	English
Pages (from-to)	7610-7615
Number of pages	6
Journal	Nano Letters
Volume	16
Issue number	12
DOIs	https://doi.org/10.1021/acs.nanolett.6b03543
State	Published - 14 Dec 2016

Bibliographical note

Publisher Copyright:
© 2016 American Chemical Society.

Keywords

Single atom magnets
XMCD
graphene
rare earth atoms
self-assembly
superlattice

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10.1021/acs.nanolett.6b03543

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title = "Superlattice of Single Atom Magnets on Graphene",

abstract = "Regular arrays of single atoms with stable magnetization represent the ultimate limit of ultrahigh density storage media. Here we report a self-assembled superlattice of individual and noninteracting Dy atoms on graphene grown on Ir(111), with magnetic hysteresis up to 5.6 T and spin lifetime of 1000 s at 2.5 K. The observed magnetic stability is a consequence of the intrinsic low electron and phonon densities of graphene and the 6-fold symmetry of the adsorption site. Our array of single atom magnets has a density of 115 Tbit/inch2, defined by the periodicity of the graphene moir{\'e} pattern.",

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AU - Baltic, Romana

AU - Pivetta, Marina

AU - Donati, Fabio

AU - Wäckerlin, Christian

AU - Singha, Aparajita

AU - Dreiser, Jan

AU - Rusponi, Stefano

AU - Brune, Harald

PY - 2016/12/14

Y1 - 2016/12/14

N2 - Regular arrays of single atoms with stable magnetization represent the ultimate limit of ultrahigh density storage media. Here we report a self-assembled superlattice of individual and noninteracting Dy atoms on graphene grown on Ir(111), with magnetic hysteresis up to 5.6 T and spin lifetime of 1000 s at 2.5 K. The observed magnetic stability is a consequence of the intrinsic low electron and phonon densities of graphene and the 6-fold symmetry of the adsorption site. Our array of single atom magnets has a density of 115 Tbit/inch2, defined by the periodicity of the graphene moiré pattern.

AB - Regular arrays of single atoms with stable magnetization represent the ultimate limit of ultrahigh density storage media. Here we report a self-assembled superlattice of individual and noninteracting Dy atoms on graphene grown on Ir(111), with magnetic hysteresis up to 5.6 T and spin lifetime of 1000 s at 2.5 K. The observed magnetic stability is a consequence of the intrinsic low electron and phonon densities of graphene and the 6-fold symmetry of the adsorption site. Our array of single atom magnets has a density of 115 Tbit/inch2, defined by the periodicity of the graphene moiré pattern.

KW - Single atom magnets

KW - XMCD

KW - graphene

KW - rare earth atoms

KW - self-assembly

KW - superlattice

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JO - Nano Letters

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Superlattice of Single Atom Magnets on Graphene

Abstract

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Keywords

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