Anomalous perpendicular anisotropy in ultra-thin co films

Michael H. Wiedmann, Brad N. Engel, Robert A. Van Leeuwen, Ko Mibu, Teruya Shinjo, Charles Falco

Research output: Chapter in Book/Report/Conference proceedingConference contribution

15 Scopus citations


We have used in situ polar Kerr effect measurements to study the magnetic coercivity and anisotropy of MBE-grown Pd(111)/Co/X and Au(111)/Co/X trilayers, where X is the non-magnetic noble or transition metal overlayers Ag, Cu or Pd. Polar hysteresis curves were measured in situ for systematically varied Co and overlayers thicknesses 2 Angstrom ≤ tCo≤20 Angstrom and 0 Angstrom ≤tx≤50 Angstrom. We find the coercivity and total anisotropy display a strongly peaked perpendicular contribution at ≈1 atomic layer (2 Angstrom) non-magnetic metal coverage. For Cu where the effect is strongest, the total anisotropy energy rapidly decreases by a factor of 3 from its peak value after a total coverage of ≈2 atomic layers (4 Angstrom) of Cu.

Original languageEnglish (US)
Title of host publicationMultilayers and Surfaces
PublisherPubl by Materials Research Society
Number of pages6
ISBN (Print)1558992111, 9781558992115
StatePublished - 1993
EventProceedings of the 1993 MRS Spring Meeting on Magnetic Ultrathin Films - San Francisco, CA, USA
Duration: Apr 12 1993Apr 16 1993

Publication series

NameMaterials Research Society Symposium Proceedings
ISSN (Print)0272-9172


OtherProceedings of the 1993 MRS Spring Meeting on Magnetic Ultrathin Films
CitySan Francisco, CA, USA

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering


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