Magnetic Anisotropy Energy of L10 CoPt-B Thin Films Elongated c-axis

Hiroshi Yamaguchi, Osamu Kitakami, Satoshi Okamoto, Yutaka Shimada, Katsunari Oikawa, Kazuaki Fukamichi, Te Hsuan Chiang

Research output: Contribution to journalArticlepeer-review

4 Citations (Scopus)


Very small amount of B promotes the disorder/order transformation of L10 CoPt at low annealing temperature along with excellent c-axis orientation. The c-axis is slightly expanded by B atoms interstitially incorporated into the octahedral sites in the L10 CoPt lattice. Magnetic measurements using Hall magnetometry have revealed that the magnetic anisotropy energy (MAE) is enhanced by elongation of the c-axis. This result is in harmony with the first principles calculation which predicts that the c-axis elongation enhances the MAE of L10 CoPt due to the d band splitting of Co near the Fermi level in the minority spin state.

Original languageEnglish
Pages (from-to)1514-1517
Number of pages4
JournalMaterials Transactions
Issue number8
Publication statusPublished - 2003 Aug


  • Boron
  • Cobalt platinum
  • Disorder-order transformation
  • L1
  • Magnetic anisotropy


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