Evidence of ferromagnetism in Zn1-xMxO (M ≤ Ni,Cu) nanocrystals for spintronics

O. Perales-Perez, A. Parra-Palomino, R. Singhal, P. M. Voyles, Ye Zhu, W. Jia, M. S. Tomar

Research output: Journal article publicationJournal articleAcademic researchpeer-review

22 Citations (Scopus)

Abstract

We present the conditions for room-temperature synthesis of bare, Ni-and Cu-doped ZnO nanocrystals in ethanol and their characterization. The formation of a ZnO host structure was delayed when dopant ions co-existed in the starting solutions. After ageing in mother liquors, well-crystallized doped nanocrystals were produced. Monodispersity of the nanocrystals (5-8 nm) was shown by high resolution transmission electron microscopy (HRTEM). Ultraviolet-visible (UV-vis) and photoluminescence (PL) measurements also confirmed the nanocrystalline nature and the continuous growth of the crystals when aged at room temperature. Room-temperature SQUID measurements showed weak but noticeable ferromagnetism, which was dependent on synthesis conditions.
Original languageEnglish
Article number315606
JournalNanotechnology
Volume18
Issue number31
DOIs
Publication statusPublished - 8 Aug 2007
Externally publishedYes

ASJC Scopus subject areas

  • Bioengineering
  • Chemistry(all)
  • Materials Science(all)
  • Mechanics of Materials
  • Mechanical Engineering
  • Electrical and Electronic Engineering

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