Strong perpendicular magnetic anisotropy of Pt/Co/AlN structure

Young Chan Won, Jae Pyoung Ahn, Sang Ho Lim

Research output: Contribution to journalArticlepeer-review

Abstract

In this study, the perpendicular magnetic anisotropy (PMA) and microstructure of Pt/Co/AlN stacks were investigated. At a Co thickness of 0.5 nm, the magnetic moment was not observed in the as-deposited state, but after annealing, it increased significantly. Furthermore, a strong PMA was obtained in the annealed samples; after annealing at 300 °C and 400 °C, the effective PMA energy densities were 2.28 and 1.96 × 107 erg/cm3, respectively. Similar behavior was observed for samples with thicker Co layers. The magnetic dead layer and interfacial PMA energy density were also investigated to determine the interfacial effects on PMA. The occurrence of strong PMA was supported by high-resolution cross-sectional transmission electron microscopy results, demonstrating a well-defined layered structure for the annealed Pt/Co/AlN samples.

Original languageEnglish
Article number165514
JournalJournal of Alloys and Compounds
Volume918
DOIs
Publication statusPublished - 2022 Oct 15

Keywords

  • Magnetic thin films
  • Perpendicular magnetic anisotropy
  • Pt/Co/AlN trilayers

ASJC Scopus subject areas

  • Mechanics of Materials
  • Mechanical Engineering
  • Metals and Alloys
  • Materials Chemistry

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