Formation of ordered tetragonal PtCo from epitaxial Pt/Co multilayers

  • Artymowicz D
  • Lairson B
  • Clemens B
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Abstract

Formation of ordered tetragonal PtCo from epitaxial Pt(001)/Co(001) multilayers was observed via in situ X-ray diffraction measurements at four different annealing temperatures. The measured activation energy of formation of ordered PtCo is 2.1 ± 0.2 eV. Ordering in the PtCo phase is not complete even after 1100 min annealing at 570°C. Growth proceeds by nucleation of domains less than 10 Å in thickness, which thicken at a rate approximately proportional to the square root of time.

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Authors

  • D. M. Artymowicz

  • B. M. Lairson

  • B. M. Clemens

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