Structural and magnetic properties of Co-doped ZnO epitaxial films

Lee H., Lee S., Yildiz F., Jeong Y.

Journal of Magnetism and Magnetic Materials, vol.310, no.2 SUPPL. PART 3, pp.2089-2091, 2007 (SCI-Expanded, Scopus) identifier identifier

  • Publication Type: Article / Article
  • Volume: 310 Issue: 2 SUPPL. PART 3
  • Publication Date: 2007
  • Doi Number: 10.1016/j.jmmm.2006.10.1020
  • Journal Name: Journal of Magnetism and Magnetic Materials
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.2089-2091
  • Keywords: laser MBE, diluted magnetic semiconductor, Co-doped ZnO thin film
  • Manisa Celal Bayar University Affiliated: No

Abstract

We examined growth conditions to obtain the best quality epitaxial Co-doped ZnO thin films by the laser MBE deposition technique. The RHEED pattern and XRD analysis showed that the growth mode is layer-by-layer and a single phase of the wurtzite ZnO structure results at the optimum growth condition, that is, laser fluence, oxygen partial pressure and substrate temperature being at 0.45 J/cm2, 1.0×10-6 torr and 550 °C, respectively. From AFM measurements, the root mean square value of surface roughness was determined to be about 2 Å. The epitaxial Co-doped ZnO thin films were shown to possess intrinsic ferromagnetic ordering at room temperature. © 2006 Elsevier B.V. All rights reserved.