Atomic-scale magnetic dissipation from spin-dependent adhesion hysteresis

Link:
Autor/in:
Erscheinungsjahr:
2012
Medientyp:
Text
Schlagworte:
  • Atomic force microscopy
  • Tips
  • Noncontact atomic
  • Atomic Force Microscopy
  • Self Assembled Monolayers
  • Molecules
  • Atomic force microscopy
  • Tips
  • Noncontact atomic
  • Atomic Force Microscopy
  • Self Assembled Monolayers
  • Molecules
Beschreibung:
  • In this paper we develop a realistic theoretical understanding of the atomic-scale spin-dependent dissipation observed in recent magnetic exchange force microscopy experiments. The origin of dissipation is investigated using Monte Carlo energy minimization techniques for experiments performed with an Fe-coated tip on the antiferromagnetic insulator NiO(001). Our calculations demonstrate that adhesion hysteresis is site as well as distance dependent. The magnitude of the computed spin-dependent adhesion hysteresis agrees well with the experimentally measured magnetic dissipation. Particularly, we show that this mechanism does not necessarily involve spin flips but includes the previously proposed Caldeira-Leggett-type dissipation as a special case.
Lizenz:
  • info:eu-repo/semantics/restrictedAccess
Quellsystem:
Forschungsinformationssystem der UHH

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Quelldatensatz
oai:www.edit.fis.uni-hamburg.de:publications/36526ee8-1a14-45e3-aa8a-a33b1587a14b