Formation of octahedral FePt nanoparticles by alternate deposition of FePt and MgO

T. Shima*, K. Takanashi, Y. K. Takahashi, K. Hono

*Corresponding author for this work

Research output: Contribution to journalReview articlepeer-review

46 Citations (Scopus)

Abstract

Two-dimensional assemblies of octahedral-shaped FePt nanoparticles embedded in a MgO matrix were formed by alternate deposition of FePt and MgO layers on MgO (001) single-crystal substrates with a thermal cycling process. Highly ordered L 10 structure with the [001] orientation perpendicular to the plane and large coercivity of more than 60 kOe were obtained. Cross-sectional transmission electron microscopy observation revealed that the equilibrium crystal shape of L 10 ordered FePt particles was octahedral structure due to the anisotropy of the surface energy. The {111} plane shows the minimum surface energy in the L 10 structure, which is similar to the case of face-centered-cubic structure.

Original languageEnglish
Article number063117
JournalApplied Physics Letters
Volume88
Issue number6
DOIs
Publication statusPublished - 2006 Feb
Externally publishedYes

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

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