Magnetic properties of ultrathin Si/Co/Ir(111) films

J. S. Tsay, Y. C. Liu

Research output: Contribution to journalArticlepeer-review

6 Citations (Scopus)


A magnetic phase diagram for Si/Co/Ir(111) films has been established by the surface magneto-optic Kerr effect technique. The Si coverage, where ferromagnetism vanishes, increases from one monolayer to more than three monolayers as the coverage of the Co layer increases from two to five monolayers. As silicon is deposited on the surface of Co/Ir(111) films, Si atoms interact with the Co layer to form Si-Co compounds. The rough Si/Co interface impedes the motion of domain walls during the magnetization reversal process, thus increasing the coercive force. The formation of nonmagnetic Co-Si compounds reduces the effective magnetic layers, leading to a decrease in Kerr intensity and superparamagnetic behavior of the films.

Original languageEnglish
Article number445003
JournalJournal of Physics Condensed Matter
Issue number44
Publication statusPublished - 2008 Nov 5

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics


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