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Large magnetic anisotropy of a single atomic spin embedded in a surface molecular network.

Authors
  • Hirjibehedin, Cyrus F
  • Lin, Chiung-Yuan
  • Otte, Alexander F
  • Ternes, Markus
  • Lutz, Christopher P
  • Jones, Barbara A
  • Heinrich, Andreas J
Type
Published Article
Journal
Science
Publisher
American Association for the Advancement of Science (AAAS)
Publication Date
Aug 31, 2007
Volume
317
Issue
5842
Pages
1199–1203
Identifiers
PMID: 17761877
Source
Medline
License
Unknown

Abstract

Magnetic anisotropy allows magnets to maintain their direction of magnetization over time. Using a scanning tunneling microscope to observe spin excitations, we determined the orientation and strength of the anisotropies of individual iron and manganese atoms on a thin layer of copper nitride. The relative intensities of the inelastic tunneling processes are consistent with dipolar interactions, as seen for inelastic neutron scattering. First-principles calculations indicate that the magnetic atoms become incorporated into a polar covalent surface molecular network in the copper nitride. These structures, which provide atom-by-atom accessibility via local probes, have the potential for engineering anisotropies large enough to produce stable magnetization at low temperatures for a single atomic spin.

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