Giant enhancement of magneto-optical response and increase in perpendicular magnetic anisotropy of ultrathin Co/Pt(111) films upon thermal annealing

M. T. Lin, C. C. Kuo, H. Y. Her, Y. E. Wu, Jyh-Shen Tsay, Ching-Song Shern

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7 Citations (Scopus)


The annealing effects on the magnetic properties, crystallographic structure, and alloy formation, were studied for Co/Pt (111) ultrathin films at coverages up to 6.6 ML, using in situ magneto-optical Kerr effect, low energy electron diffraction, Auger electron spectroscopy, and ultra-violet photoelectron spectroscopy. After the postdeposition annealing in the temperature range of 500-800 K, a significant increase in perpendicular magnetic anisotropy at high coverages and a large enhancement of magneto-optical response with the value about 200%-300% of that before annealing for all coverages investigated are observed. Both findings are shown to be correlated to the formation of a kind of Co-Pt interface (surface) alloy. This is expected to be mainly attributed to the transfer of strong spin-orbit coupling of the Pt into the Co magnetic orbital due to the hybridization during interface alloy formation.

Original languageEnglish
Pages (from-to)3045-3050
Number of pages6
JournalJournal of Vacuum Science and Technology A: Vacuum, Surfaces and Films
Issue number5
Publication statusPublished - 1999 Jan 1


ASJC Scopus subject areas

  • Condensed Matter Physics
  • Surfaces and Interfaces
  • Surfaces, Coatings and Films

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