Robust room-temperature ferromagnetism with giant anisotropy in Nd-doped Zno nanowire arrays

Dandan Wang, Qian Chen, Guozhong Xing, Jiabao Yi, Saidur Rahman Bakaul, Jun Ding, Jinlan Wang*, Tao Wu

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

155 Scopus citations

Abstract

As an important class of spintronic material, ferromagnetic oxide semiconductors are characterized with both charge and spin degrees of freedom, but they often show weak magnetism and small coercivity, which limit their applications. In this work, we synthesized Nd-doped ZnO nanowire arrays which exhibit stable room temperature ferromagnetism with a large saturation magnetic moment of 4.1 μ B/Nd as well as a high coercivity of 780 Oe, indicating giant magnetic anisotropy. First-principles calculations reveal that the remarkable magnetic properties in Nd-doped ZnO nanowires can be ascribed to the intricate interplay between the spin moments and the Nd-derived orbital moments. Our complementary experimental and theoretical results suggest that these magnetic oxide nanowires obtained by the bottom-up synthesis are promising as nanoscale building blocks in spintronic devices.

Original languageEnglish (US)
Pages (from-to)3994-4000
Number of pages7
JournalNano Letters
Volume12
Issue number8
DOIs
StatePublished - Aug 8 2012

Keywords

  • Nd-doped ZnO
  • dilute magnetic semiconductors
  • first-principles method
  • nanowires

ASJC Scopus subject areas

  • Bioengineering
  • Chemistry(all)
  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanical Engineering

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