Critical thickness for itinerant ferromagnetism in ultrathin films of SrRuO3

Jing Xia, W. Siemons, Gertjan Koster, M.R. Beasley, A. Kapitulnik

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Abstract

Ultrathin films of the itinerant ferromagnet SrRuO3 were studied using the transport and magneto-optic polar Kerr effect. We find that below 4 monolayers, the films become insulating and their magnetic character changes as they loose their simple ferromagnetic behavior. We observe a strong reduction in the magnetic moment which for 3 monolayers and below lies in the plane of the film. Exchange-bias behavior is observed below the critical thickness and may point to induced antiferromagnetism in contact with ferromagnetic regions.
Original languageUndefined
Article number140407
Pages (from-to)-
JournalPhysical review B: Condensed matter and materials physics
Volume79
Issue number14
DOIs
Publication statusPublished - 2009

Keywords

  • METIS-260421
  • IR-61345
  • Magnetic thin films
  • Magnetic anisotropy
  • Ferromagnetic materials
  • Kerr magneto-optical effect
  • strontium compounds
  • magnetic moments

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