Superlattice of Single Atom Magnets on Graphene

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

Research output: Contribution to journalArticlepeer-review

62 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 languageEnglish
Pages (from-to)7610-7615
Number of pages6
JournalNano Letters
Volume16
Issue number12
DOIs
StatePublished - 14 Dec 2016

Keywords

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

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