Magneto-optical properties of ZnO:Co nanocrystalline films

Luc Huy Hoang, Nguyen The Khoi, Nguyen Hoang Hai, W. Pacuski, In Sang Yang

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6 Scopus citations


Co doped ZnO films were synthesized from the precursors Zn(CH 3COO)2.2H2O and Co(CH3COO) 2.4H2O by using a "High Voltage Spray Pyrolysis" technique. The physical properties of the prepared films were characterized by using scanning electron microscopy (SEM), X-ray diffraction (XRD) and physical property mesurement system (PPMS) measurements. The films studied were of a wurtzite phase with grain sizes of about 20 nm. The 5 % Co-doped ZnO films exhibited ferromagnetic behavior at room temperature. The transmission and the optical magnetic circular dichroism (MCD) measurements confirmed that Co 2+ was located at the tetrahedral sites of the ZnO wurtzite structure. MCD results showed that the observed ferromagnetism was less likely related to a carrier-induced mechanism.

Original languageEnglish
Pages (from-to)1621-1624
Number of pages4
JournalJournal of the Korean Physical Society
Issue number5
StatePublished - May 2008


  • Diluted magnetic semiconductor
  • Ferromagnetism
  • Optical magnetic circular dichroism


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