Paper Title:
Ferromagnetic Homogeneous Polycrystalline Zn1-xCoxO Oxides
  Abstract

In this work, the structural and magnetic properties of polycrystalline Zn1-xCoxO (x = 0, 0.02, 0.05, 0.0625, 0.10 and 0.15) oxides were studied in detail. Rietveld refinement of x-ray diffraction spectra indicates that a single-phase wurtzite structure was formed in Zn1-xCoxO samples for x up to 0.10. The magnetization for x = 0.02 can be fitted to a model with a paramagnetic Curie term and a diamagnetic constant which could arise from spins of isolated free Co ions and a diamagnetic background, respectively. For x > 0.02, however, an additional antiferromagnetic Curie-Weiss term needs to employ for fitting. This is due to an additional contribution from clustered Co ions that are in nearest neighbor positions through oxygen ions. Results show that the substitution of Co at the Zn site does not occur in a completely random manner but Co ions appear to have a tendency for clustering. In addition, the homogenous ZnO:Co thin film prepared by Pulsed Laser Deposition on SiO2/Si substrate shows ferromagnetic behavior at room temperature.

  Info
Periodical
Edited by
P. VINCENZINI
Pages
2520-2527
DOI
10.4028/www.scientific.net/AST.45.2520
Citation
Y. B. Zhang, S. Li, "Ferromagnetic Homogeneous Polycrystalline Zn1-xCoxO Oxides", Advances in Science and Technology, Vol. 45, pp. 2520-2527, 2006
Online since
October 2006
Export
Price
$32.00
Share

In order to see related information, you need to Login.

In order to see related information, you need to Login.

Authors: Yue Bin Zhang, Thirumany Sritharan, Sean Li
Abstract:Polycrystalline stoichiometric Co-substituted ZnO oxides have been synthesized by solid state reaction via sintering ZnO and Co powders in...
27
Authors: Soumia Lardjane, Mohammad Arab Pour Yazdi, Noureddine Fenineche, G. Merad, H.I. Feraoun, Alain Billard
Abstract:Zn1-xCoxO (0 < x < 14.6) diluted magnetic semiconductor coatings have been obtained by reactive DC magnetron...
251
Authors: Petr Dmitrievich Andriushchenko, Konstantin Valentinovich Nefedev
Chapter 1: Advanced Materials and Processing Technology
Abstract:In this paper we consider an approach, which allows the research of order-disorder transitionin lattice systems (with any distribution of the...
166
Authors: Min Xu, Qun Jiao Wang
Chapter 2: Nanoscale Materials
Abstract:The paper has described the formation of nanocrystalline Mn80Bi20 powders by mechanical alloying and studied the...
217
Authors: Arundhati Sengupta, Susmita Misra, Shanker Ram
Abstract:A transition metal ion Cr4+(3d2 spins) doped ZrO2 of small crystallites presents tailored magnetic,...
101