High melting point metal (Pt, W) seed layer for grain size refinement of FePt-based heat-assisted magnetic recording media

Jian Wang, Dong Liu, Ippei Suzuki, Yukiko Takahashi, Mi Yan, Kazuhiro Hono

Research output: Contribution to journalArticle

Abstract

Refinement of the FePt grain size for heat-assisted magnetic recording (HAMR) media was explored by utilizing high melting point metals Pt and W as seed layers. Unlike the W, the Pt seed layer promotes a good epitaxial growth and leads to a higher degree of L10-ordering in FePt films. It also substantially refines the FePt grains from big islands into smaller particles. For the FePt-C nanogranular film, the Pt seed layer improves the wettability and favors a single-columnar growth. Thus, the Pt seed layer provides a new valid approach to optimize the microstructure and magnetic properties for next-generation FePt-based HAMR media.

Original languageEnglish
Article number023007
JournalApplied Physics Express
Volume12
Issue number2
DOIs
Publication statusPublished - 2019 Feb

ASJC Scopus subject areas

  • Engineering(all)
  • Physics and Astronomy(all)

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