Ferromagnetic and optical properties of partially Cu-doped ZnO films

Fan Yong Ran, Masaki Tanemura, Yasuhiko Hayashi, Norihiro Ide, Masao Imaoka, Tun Seng Herng, Shu Ping Lau

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

Wurtzite structure ZnO films (3×3 mm2) with a partial-area Cu doping were successfully prepared using a micro-area Ar+-ion beam (~380 μm in diameter) and a simultaneous Cu supply at room temperature. A Cu2O phase was formed in the ZnO films by Cu doping. The partially Cu-doped ZnO films exhibited room-temperature ferromagnetism (RTFM) with a saturation magnetization of 1.6×10-5 emu and a coercive field of 40 Oe. Since Zn, Cu, and their compounds are not ferromagnetic, the observed RTFM is attributed to the intrinsic property of Cu-doped ZnO films. As confirmed by the low temperature photoluminescence (PL) spectra, no serious optical damage was recognized in the region without Ar+-ion irradiation. Thus, it was believed that the micro-area Ar+-ion irradiation with a simultaneous Cu supply was promising to integrate the magnetic and optical properties of ZnO-based materials.

Original languageEnglish
Number of pages1
JournalZeitschrift fur Naturforschung - Section A Journal of Physical Sciences
Volume64
Issue number11
DOIs
Publication statusPublished - 2009

Keywords

  • Ar-Ion Beam
  • Cu-doped ZnO Films
  • Room-temperature ferromagnetism

ASJC Scopus subject areas

  • Mathematical Physics
  • Physics and Astronomy(all)
  • Physical and Theoretical Chemistry

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