Contributions of Co and Fe orbitals to perpendicular magnetic anisotropy of MgO/CoFeB bilayers with Ta, W, IrMn, and Ti underlayers

Sanghoon Kim, Seungheon Chris Baek, Mio Ishibashi, Kihiro Yamada, Takuya Taniguchi, Takaya Okuno, Yoshinori Kotani, Tetsuya Nakamura, Kab Jin Kim, Takahiro Moriyama, Byong Guk Park, Teruo Ono

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6 Citations (Scopus)

Abstract

We study the perpendicular magnetic anisotropy (PMA) of the CoFeB/MgO bilayers in contact with W, Ta, IrMn, and Ti, which have been suggested for use as the spin-orbit-torque-related underlayers. The saturation magnetization of CoFeB depends on the underlayer material used owing to the formation of a dead layer that affects the PMA strength of each film. The X-ray magnetic circular dichroism measurement reveals that interfacial intermixing suppresses only the perpendicular orbital moment of Fe, whereas it simultaneously suppresses both the perpendicular and in-plane orbital moments of Co.

Original languageEnglish
Article number073006
JournalApplied Physics Express
Volume10
Issue number7
DOIs
Publication statusPublished - 2017 Jul
Externally publishedYes

ASJC Scopus subject areas

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

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    Kim, S., Baek, S. C., Ishibashi, M., Yamada, K., Taniguchi, T., Okuno, T., Kotani, Y., Nakamura, T., Kim, K. J., Moriyama, T., Park, B. G., & Ono, T. (2017). Contributions of Co and Fe orbitals to perpendicular magnetic anisotropy of MgO/CoFeB bilayers with Ta, W, IrMn, and Ti underlayers. Applied Physics Express, 10(7), [073006]. https://doi.org/10.7567/APEX.10.073006