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Magneto-optical properties of ZnO:Co nanocrystalline films

Title
Magneto-optical properties of ZnO:Co nanocrystalline films
Authors
Hoang L.H.Khoi N.T.Hai N.H.Pacuski W.Yang I.-S.
Ewha Authors
양인상
SCOPUS Author ID
양인상scopus
Issue Date
2008
Journal Title
Journal of the Korean Physical Society
ISSN
0374-4884JCR Link
Citation
vol. 52, no. 5, pp. 1621 - 1624
Indexed
SCI; SCIE; SCOPUS; KCI WOS scopus
Abstract
Co doped ZnO films were synthesized from the precursors Zn(CH 3COO) 2.2H 2O and Co(CH 3COO) 2.4H 2O 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.
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자연과학대학 > 물리학전공 > Journal papers
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