Structure and perpendicular magnetic anisotropy of a new CoPtx alloy grown by MBE

J. C.A. Huang, T. H. Wu, A. C. Hsu, L. C. Wu, Y. M. Hu

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5 Citations (Scopus)


High-quality, epitaxial CoPtx alloy films were prepared on Mo(211) seeding layer on A12O3 (1-100) substrate at growth temperature of ∼ 400°C. A new FCC (311) orientation with modest perpendicular magnetic anisotropy is established for large Pt/Co composition ratio x (2 < x < 3). With decreasing of x to about 1.1-1.5, an ordered L11-like phase together with a weaker HCP (1-100) peak was observed by X-ray diffraction. The development of the L11 phase in turn results in an enhancement of perpendicular coercivity and squareness of the Kerr rotation loop. Annealing at high-temperature (650°C) results in a structure change and deterioration of the perpendicular magnetic anisotropy.

Original languageEnglish
Pages (from-to)166-169
Number of pages4
JournalJournal of Magnetism and Magnetic Materials
Issue number1-3
Publication statusPublished - 1999 Jan 1

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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