Enhanced ferromagnetism in Cu-Substituted ZnO nanoparticles

Retno Asih*, Dyah A. Daratika, Fahmi Astuti, Malik A. Baqiya, Isao Watanabe, Chatree Saiyasombat, Masatsune Kato, Yoji Koike, Andrivo Rusydi, Darminto*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

2 Citations (Scopus)


Cu-substituted ZnO thin films are known to exhibit room-temperature ferromagnetism. Herein, we report a large enhancement of ferromagnetism in nanoparticles of Zn1−xCuxO (CZOs) at x ∼ 1/8. In addition to the magnetic moment arising from the Cu 3d9 spins, these nanoparticles provide a unique platform to produce a significant number of oxygen vacancies (VOs), which gives rise to a long-range ferromagnetic order due to the interaction with the spins of Cu 3d9 through the oxygen vacancies and Cu 3d9 ligand holes. Interestingly, the highest magnetization occurs in CZO with x ≈ 0.13. Thus, our results emphasize the importance of the interplay between the Cu 3d9 spins with oxygen vacancies and Cu 3d9 ligand holes in generating a long-range ferromagnetic order.

Original languageEnglish
Article number125606
JournalMaterials Chemistry and Physics
Publication statusPublished - 15 Feb 2022


  • Cu-substituted ZnO
  • Dilute magnetic semiconductor
  • Magnetism
  • Nanoparticles
  • Oxygen vacancies


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