Formation and perpendicular magnetic coupling of a1 and l10 copt in copt/tin films on glass substrate

Hongyu An, Kazuya Ando, Yoshio Nakamura, Ji Shi

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1 Citation (Scopus)


We have studied the structure and the magnetic properties of CoPt films by using TiN spacer layer deposited on a glass substrate. We show that after annealing at 700 °C, a highly (001)-textured L10 CoPt structure has been successfully obtained. However, by increasing the annealing temperature to 800 °C, two magnetic phases A1 CoPt and L10 CoPt are formed despite of the better crystallinity of CoPt than that annealed at 700 °C. By measuring the minor magnetic hysteresis loops of the samples after applying a field cooling in a range from room temperature to 500 °C, we have further studied the magnetic coupling between A1 and L10 CoPt phases in the out-of-plane direction of the films. Our work may provide a piece of information for other studies on the heat-assisted magnetic recording.

Original languageEnglish
Article number8440674
JournalIEEE Transactions on Magnetics
Issue number2
Publication statusPublished - 2019 Feb


  • Heat-assisted magnetic recording (hamr)
  • L1 Copt
  • Perpendicular magnetic anisotropy (pma)
  • Tin

ASJC Scopus subject areas

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


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