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

Research output: Contribution to journalArticlepeer-review

9 Citations (Scopus)


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.

Original languageEnglish
Article number073003
JournalApplied Physics Express
Issue number7
Publication statusPublished - 2017 Jul

ASJC Scopus subject areas

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


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