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The Scientific World Journal
Volume 2014 (2014), Article ID 265969, 7 pages
Research Article

The Influence of Doping with Transition Metal Ions on the Structure and Magnetic Properties of Zinc Oxide Thin Films

1National Institute for Research and Development in Electrical Engineering, Splaiul Unirii No. 313, Bucharest, Romania
2Transilvania University of Brasov, Eroilor No. 29, Brasov, Romania

Received 22 August 2013; Accepted 16 December 2013; Published 10 February 2014

Academic Editors: Y. Chai, C. He, and Y. Yun

Copyright © 2014 Jenica Neamtu and Marius Volmer. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


( ) and ( ) thin films were synthesized by sol-gel method. The structure and the surface morphology of zinc oxide thin films doped with transition metal (TM) ions have been investigated by X-ray diffraction (XRD) and atomic force microscopy (AFM). The magnetic studies were done using vibrating sample magnetometer (VSM) at room temperature. Experimental results revealed that the substitution of Ni ions in ZnO wurtzite lattice for the contents ( ) leads to weak ferromagnetism of thin films. For with , the ions are magnetic coupling by superexchange interaction via oxygen ions in wurtzite structure. For ( ) one can observe the increasing of secondary phase of ZnFe2O4 spinel. The Zn0.9Fe0.1O film shows a superparamagnetic behavior due to small crystallite sizes and the net spin magnetic moments arisen from the interaction between the iron ions through an oxygen ion in the spinel structure.