Pt surface segregation in L10-FePt nano-grains

H. Sepehri-Amin, H. Iwama, G. Hrkac, K. T. Butler, T. Shima, K. Hono

Research output: Contribution to journalArticlepeer-review

10 Citations (Scopus)


The influence of the chemical compositions of FePt films on the surface segregations of Pt was investigated by cross-sectional high angle annular dark field (HAADF) scanning transmission electron microscopy (STEM) of L10-FePt granular films grown on single crystalline MgO substrates. Ab initio atomistic simulations revealed the surface segregation of Pt is detremental for the magentocrystalline anisotropy energy of the L10-FePt grains. This detremental effect is pronounced for the grain size of less than 15 nm. We found that the Pt surface segregation can be suppressed by a trace addition of Ag to the FePt film.

Original languageEnglish
Pages (from-to)88-91
Number of pages4
JournalScripta Materialia
Publication statusPublished - 2017 Jul 1
Externally publishedYes


  • Atomistic simulation
  • FePt
  • Microstructure
  • Surface segregation

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering
  • Metals and Alloys


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