Superlattice of Single Atom Magnets on Graphene.
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Baltic R
Institute of Physics, Ecole Polytechnique Fédérale de Lausanne , Station 3, CH-1015 Lausanne, Switzerland.
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Pivetta M
Institute of Physics, Ecole Polytechnique Fédérale de Lausanne , Station 3, CH-1015 Lausanne, Switzerland.
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Donati F
Institute of Physics, Ecole Polytechnique Fédérale de Lausanne , Station 3, CH-1015 Lausanne, Switzerland.
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Wäckerlin C
Institute of Physics, Ecole Polytechnique Fédérale de Lausanne , Station 3, CH-1015 Lausanne, Switzerland.
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Singha A
Institute of Physics, Ecole Polytechnique Fédérale de Lausanne , Station 3, CH-1015 Lausanne, Switzerland.
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Dreiser J
Institute of Physics, Ecole Polytechnique Fédérale de Lausanne , Station 3, CH-1015 Lausanne, Switzerland.
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Rusponi S
Institute of Physics, Ecole Polytechnique Fédérale de Lausanne , Station 3, CH-1015 Lausanne, Switzerland.
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Brune H
Institute of Physics, Ecole Polytechnique Fédérale de Lausanne , Station 3, CH-1015 Lausanne, Switzerland.
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English
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.
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Open access status
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green
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https://sonar.ch/global/documents/215013
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