Effect of annealing temperature on structure and magnetic properties of L10-FePd/CoFeB bilayer

M. N.I. Khan, Hiroshi Naganuma, N. Inami, Mikihiko Ogane, Yasuo Ando

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)

Abstract

The effects of annealing temperature on the structural and magnetic properties of CoFeB/FePd bilayer were systematically investigated. A thin (0.5 nm) CoFeB layer was inserted between the FePd and MgO layers and then annealed at different temperatures. The magnetic anisotropy field increased with an increase in the annealing temperature owing to the enhancement of the interfacial perpendicular magnetic anisotropy (PMA) by crystallizing the thin CoFeB layer. The thermal annealing of the deposited layers promoted L1 0 ordering and reduced the surface roughness. It was found that a thinner FePd layer requires a higher annealing temperature in order to achieve PMA. After annealing at 350°C, a PMA of 7.1 Merg/cc was obtained even for a thin FePd film with a thickness of 2.0 nm.

Original languageEnglish
Article number6558953
Pages (from-to)4409-4412
Number of pages4
JournalIEEE Transactions on Magnetics
Volume49
Issue number7
DOIs
Publication statusPublished - 2013 Aug 2

Keywords

  • CoFeB L1-ordered alloy
  • FePd
  • interfacial perpendicular magnetic anisotropy

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Electrical and Electronic Engineering

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