Ag-related alloy formation and magnetic phases for Ag/Co/Ir(111) ultrathin films

Jyh-Shen Tsay, Du Cheng Tsai, Cheng Hsun Tony Chang, Wei Hsiang Chen

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

The Kerr intensity versus the Ag thickness for Ag grown on the top of Co/Ir(111) exhibits an oscillating behavior with a period around one monolayer which should be due to the morphological change related electronic structure differences of the Ag layer. From systematical investigations of Ag/Co/Ir(111) films with the Co layer thinner than 4 monolayers at temperatures below 900 K, a magnetic phase diagram has been established. As the annealing temperature increases for Ag/Co/Ir(111) films, enhancements of the coercive force occur in both the polar and longitudinal configurations due to the intermixing of Ag and Co at the interface and the formation of Co-Ir alloy. The disappearance of ferromagnetism is mainly attributed to the reduced atomic percent of cobalt in Co-Ir alloy, the lowered Curie temperature by a reduction of the thickness of magnetic layers, and the intermixing of Ag and Co at the Ag/Co interface.

Original languageEnglish
Pages (from-to)475-479
Number of pages5
JournalThin Solid Films
Volume548
DOIs
Publication statusPublished - 2013 Dec 2

Keywords

  • Alloy
  • Auger electron spectroscopy
  • Cobalt
  • Iridium
  • Magnetic phases
  • Silver
  • Surface magneto-optic Kerr effect

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Surfaces and Interfaces
  • Surfaces, Coatings and Films
  • Metals and Alloys
  • Materials Chemistry

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