Microstructure and in-plane component of L10-FePt films deposited on MgO and MgAl2O4 substrates

H. Sepehri-Amin, H. Iwama, T. Ohkubo, T. Shima, K. Hono

Research output: Contribution to journalArticle

8 Citations (Scopus)

Abstract

Microstructures of FePt films deposited on MgO and MgAl2O4 single crystalline substrates were studied using aberration corrected scanning transmission electron microscopy (STEM). The [100] and [010] variants of L10-FePt were observed in-the-plane of the FePt grains deposited on the MgAl2O4 substrate, which causes in-plane component in magnetization curves. The d-spacing of the (002) planes of L10-FePt deposited on MgAl2O4 is larger than that deposited on MgO. The reduction of lattice mismatch between FePt and the substrate results in the formation of out-of-plane tensile strain leading to increase in d002 and the formation of the in-plane variants in the L10-FePt grains.

Original languageEnglish
Pages (from-to)247-251
Number of pages5
JournalScripta Materialia
Volume130
DOIs
Publication statusPublished - 2017 Mar 15

Keywords

  • FePt
  • In-plane coercivity
  • Lattice mismatch
  • Microstructure

ASJC Scopus subject areas

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

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