Applied Physics A

, Volume 115, Issue 1, pp 203–211 | Cite as

Grain boundary diffusion induced reaction layer formation in Fe/Pt thin films

  • G. L. Katona
  • I. A. Vladymyrskyi
  • I. M. Makogon
  • S. I. Sidorenko
  • F. Kristály
  • L. Daróczi
  • A. Csik
  • A. Liebig
  • G. Beddies
  • M. Albrecht
  • D. L. Beke
Article

Abstract

The solid-state reaction in Pt(15 nm)/Fe(15 nm) and Pt(15 nm)/Ag(10 nm)/Fe(15 nm) thin films after post-annealing at 593 K and 613 K for different annealing times has been studied. The structural properties of these samples were investigated by various methods including depth profiling with secondary neutral mass spectrometry, transmission electron microscopy, and X-ray diffraction. It is shown that after annealing at the above temperatures where the bulk diffusion processes are still frozen, homogeneous reaction layers of FePt and FePt with about 10 at.% Ag, respectively, have been formed. Corresponding depth profiles of the element concentrations revealed strong evidence that the formation mechanism is based on a grain boundary diffusion induced solid-state reaction in which the reaction interfaces sweep perpendicularly to the original grain boundary. Interestingly, X-ray diffraction indicated that in both thin-film systems after the solid-state reaction the ordered L10 FePt phase, which is the requested phase for future magnetic data storage applications, is also present.

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Copyright information

© Springer-Verlag Berlin Heidelberg 2013

Authors and Affiliations

  • G. L. Katona
    • 1
  • I. A. Vladymyrskyi
    • 2
  • I. M. Makogon
    • 2
  • S. I. Sidorenko
    • 2
  • F. Kristály
    • 3
  • L. Daróczi
    • 1
  • A. Csik
    • 4
  • A. Liebig
    • 5
  • G. Beddies
    • 5
  • M. Albrecht
    • 5
  • D. L. Beke
    • 1
  1. 1.Department of Solid State PhysicsUniversity of DebrecenDebrecenHungary
  2. 2.National Technical University of Ukraine “Kiev Polytechnic Institute”KievUkraine
  3. 3.Department of Mineralogy and PetrologyUniversity of MiskolcMiskolc-EgyetemvárosHungary
  4. 4.Institute for Nuclear ResearchHungarian Academy of Sciences (ATOMKI)DebrecenHungary
  5. 5.Institute of PhysicsChemnitz University of TechnologyChemnitzGermany

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