Effect of Mg interlayer on perpendicular magnetic anisotropy of CoFeB films in MgO/Mg/CoFeB/Ta structure

Q. L. Ma, S. Iihama, T. Kubota, X. M. Zhang, S. Mizukami, Y. Ando, T. Miyazaki

研究成果: Article査読

37 被引用数 (Scopus)

抄録

The effects of Mg metallic interlayer on the magnetic properties of thin CoFeB films in MgO/Mg (t Mg) / CoFeB (1.2 nm)/Ta structures were studied in this letter. Our experimental result shows that the CoFeB film exhibits perpendicular magnetic anisotropy (PMA) when the CoFeB and MgO layers are separated by a metallic Mg layer with a maximum thickness of 0.8 nm. The origin of PMA was discussed by considering the preferential transmission of the Δ 1 symmetry preserved by the Mg interlayer in crystallized MgO/Mg/CoFeB/Ta. In addition, the thin Mg interlayer also contributes to enhancing the thermal stability and reducing the effective damping constant and coercivity of the CoFeB film.

本文言語English
論文番号122414
ジャーナルApplied Physics Letters
101
12
DOI
出版ステータスPublished - 2012 9 17

ASJC Scopus subject areas

  • 物理学および天文学(その他)

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