Magnetic anisotropy of doped Cr2O3antiferromagnetic films evaluated by utilizing parasitic magnetization

Tomohiro Nozaki, Muftah Al-Mahdawi, Yohei Shiokawa, Satya Prakash Pati, Hiroshi Imamura, Masashi Sahashi

研究成果: Contribution to journalArticle査読

3 被引用数 (Scopus)

抄録

In Cr2O3 thin films doped with Al or Ir, we have discovered a parasitic magnetization, accompanied by the antiferromagnetic order, with tunable direction and magnitude. In this study, by utilizing the parasitic magnetization, the antiferromagnetic anisotropy KAF of the doped Cr2O3 thin films was evaluated. A much greater improvement of KAF was obtained for Al-doped Cr2O3 films than that of bulk. The maximum KAF in this study was ∼9 × 104 J/m3, obtained for the Al 3.7%-doped Cr2O3 film sample. The enhancement of the magnetic dipole anisotropy KMD due to the site-selective substitution is speculated for the dominant origin of the enhancement. Furthermore, based on the obtained KAF, the influence of the parasitic magnetization on the exchange bias blocking temperature TB of the doped-Cr2O3/Co exchange coupled system was discussed. TB greatly increases when the parasitic magnetization is coupled antiparallel to ferromagnetic moment, such as Al-doped Cr2O3/Co systems.

本文言語英語
論文番号023901
ジャーナルJournal of Applied Physics
128
2
DOI
出版ステータス出版済み - 7 14 2020

All Science Journal Classification (ASJC) codes

  • 物理学および天文学(全般)

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