Structural, optical and magnetic properties of Cr doped ZnO microrods prepared by spray pyrolysis method

Creative Commons License

YILMAZ Ş., PARLAK M., ÖZCAN Ş., Altunbas M., McGlynn E., BACAKSIZ E.

APPLIED SURFACE SCIENCE, vol.257, no.22, pp.9293-9298, 2011 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 257 Issue: 22
  • Publication Date: 2011
  • Doi Number: 10.1016/j.apsusc.2011.05.017
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.9293-9298
  • Hacettepe University Affiliated: Yes


A series of Cr-doped ZnO micro-rod arrays were fabricated by a spray pyrolysis method. X-ray diffraction patterns of the samples showed that the undoped and Cr-doped ZnO microrods exhibit hexagonal crystal structure. Surface morphology analysis of the samples has revealed that pure ZnO sample has a hexagonal microrod morphology. From X-ray photoelectron spectroscopy studies, the Cr 2p3/2 binding energy is found to be 577.3 eV indicating that the electron binding energy of the Cr in ZnO is almost the same as the binding energy of Cr3+ states in Cr2O3. The optical band gap E-g decreases slightly from 3.26 to 3.15 eV with the increase of actual Cr molar fraction from x = 0.00 to 0.046 in ZnO. Photoluminescence studies at 10 K show that the incorporation of chromium leads to a relative increase of deep level band intensity. It was also observed that Cr doped samples clearly showed ferromagnetic behavior; however, 2.5 at.% Cr doped ZnO showed remnant magnetization higher than that of 1.1 at.% and 4.6 at.% Cr doped samples, while 4.6 at.% Cr doped ZnO samples had a coercive field higher than the other dopings. (C) 2011 Elsevier B.V. All rights reserved.