Effect of Co replacement with Fe on uniaxial magnetocrystalline anisotropy in disordered hcp CoPtRh alloy films

Naoki Nozawa, Shin Saito, Shintaro Hinata, Migaku Takahashi

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)

Abstract

The effect of replacing Co with Fe in disordered CoPtRh alloy films was investigated with the aim to increase the spin magnetic moment. The addition of Fe into a pure Co film produced a Co98Fe2 film with maximum uniaxial magnetocrystalline anisotropy (Ku), because the magnetic moment is increased with the same degree of stacking faults (SFs) induced into the hcp grains as that for a pure Co film. (Co 0.98Fe0.02)PtRh films were compared with CoPtRh films with the same Pt and Rh contents, which revealed that: 1) the degree of SFs were increased; 2) the magnetic moment was increased; and 3) Ku was decreased for all compositions in the (Co0.98Fe0.02)PtRh films. In particular, the (Co0.98Fe0.02)PtRh and CoPtRh films with a larger Rh content than Pt have a greater range for increase of the Ku magnitude by enhancement of the magnetic moment with the retention of or further decrease in the degree of SFs.

Original languageEnglish
Article number6559041
Pages (from-to)3596-3599
Number of pages4
JournalIEEE Transactions on Magnetics
Volume49
Issue number7
DOIs
Publication statusPublished - 2013

Keywords

  • Hcp CoPtRh alloy films
  • magnetocrystalline anisotropy
  • spin-orbit interaction
  • stacking faults

ASJC Scopus subject areas

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

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