Large perpendicular exchange bias and high blocking temperature in Al-doped Cr2O3/Co thin film systems

Tomohiro Nozaki; Yohei Shiokawa; Yukie Kitaoka; Yohei Kota; Hiroshi Imamura; Muftah Al-Mahdawi; Satya Prakash Pati; Shujun Ye; Syougo Yonemura; Tatsuo Shibata; Masashi Sahashi

doi:10.7567/APEX.10.073003

Large perpendicular exchange bias and high blocking temperature in Al-doped Cr₂O₃/Co thin film systems

Tomohiro Nozaki, Yohei Shiokawa, Yukie Kitaoka, Yohei Kota, Hiroshi Imamura, Muftah Al-Mahdawi, Satya Prakash Pati, Shujun Ye, Syougo Yonemura, Tatsuo Shibata, Masashi Sahashi

電子デバイス工学

研究成果: ジャーナルへの寄稿 › 学術誌 › 査読

10 被引用数 (Scopus)

抄録

We investigated the effect of Al doping on the perpendicular exchange bias in Cr₂O₃/Co thin film systems. By Al doping, a large unidirectional anisotropy energy (J_K ∼ 0.74 erg/cm²) and a high blocking temperature (T_B) were obtained simultaneously. The variations in J_K and T_B induced by Al doping were discussed on the basis of Mauri's model and explained from an increase in magnetic anisotropy and a decrease in the exchange stiffness constant of Cr₂O₃. Our first-principles calculations suggest a factor to improve the magnetic anisotropy of Cr₂O₃ markedly, which is different from the previously established lattice strain effect.

本文言語	英語
論文番号	073003
ジャーナル	Applied Physics Express
巻	10
号	7
DOI	https://doi.org/10.7567/APEX.10.073003
出版ステータス	出版済み - 7月 2017

!!!All Science Journal Classification (ASJC) codes

工学（全般）
物理学および天文学（全般）

文献へのアクセス

10.7567/APEX.10.073003

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引用スタイル

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title = "Large perpendicular exchange bias and high blocking temperature in Al-doped Cr2O3/Co thin film systems",

abstract = "We investigated the effect of Al doping on the perpendicular exchange bias in Cr2O3/Co thin film systems. By Al doping, a large unidirectional anisotropy energy (JK ∼ 0.74 erg/cm2) and a high blocking temperature (TB) were obtained simultaneously. The variations in JK and TB induced by Al doping were discussed on the basis of Mauri's model and explained from an increase in magnetic anisotropy and a decrease in the exchange stiffness constant of Cr2O3. Our first-principles calculations suggest a factor to improve the magnetic anisotropy of Cr2O3 markedly, which is different from the previously established lattice strain effect.",

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AU - Nozaki, Tomohiro

AU - Shiokawa, Yohei

AU - Kitaoka, Yukie

AU - Kota, Yohei

AU - Imamura, Hiroshi

AU - Al-Mahdawi, Muftah

AU - Pati, Satya Prakash

AU - Ye, Shujun

AU - Yonemura, Syougo

AU - Shibata, Tatsuo

AU - Sahashi, Masashi

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