Temperature-dependent exchange splitting of a surface state on a local-moment magnet: Tb(0001)

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Erscheinungsjahr:
1999
Medientyp:
Text
Schlagworte:
  • Gadolinium
  • Magnetism
  • Electrical resistivity
  • Magnetocaloric Effects
  • Intermetallics
  • Specific Heat
  • Gadolinium
  • Magnetism
  • Electrical resistivity
  • Magnetocaloric Effects
  • Intermetallics
  • Specific Heat
Beschreibung:
  • We have investigated the temperature-dependent binding energies of the exchange-split Tb(0001) surface state by means of scanning tunneling spectroscopy. At T = 16K the majority and minority part of the surface state exhibit a binding energy of -135 ± 8meV and +430 ± 15meV, respectively. Both peak positions shift with increasing temperature and continuously decrease the exchange splitting down to 200 meV at 260 K, i.e., 30 K above the bulk Néel temperature TNB. This result is explained in terms of a decrease of helical short-range spin order with increasing temperature above TNB. 1999 © The American Physical Society.
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  • info:eu-repo/semantics/closedAccess
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Forschungsinformationssystem der UHH
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oai:www.edit.fis.uni-hamburg.de:publications/5ff403c5-cba4-4e0c-8e0d-fec2fdd36e0a