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Studies of the EPR Parameters and Local Structure of Co2+ in ZnO

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Abstract:

The EPR parameters and the local structure for Co2+ in ZnO are deduced from the perturbation formulas of these parameters for a 3d7 ion in a trigonally distorted tetrahedron. The ligand orbital and spin-orbit coupling contributions are taken into account uniformly from the cluster approach in view of the covalency of the system. The impurity V3+ is found not to locate exactly on the Zn2+ site but to experience a small displacement of 0.04 Ǻ away from the ligand triangle, along the C3 axis. The theoretical EPR parameters based upon the above impurity displacement are in good agreement with the observed values.

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Defects and Diffusion in Ceramics XII View Preview

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Periodical:

Defect and Diffusion Forum (Volumes 316-317)

Pages:

1-6

DOI:

https://doi.org/10.4028/www.scientific.net/DDF.316-317.1

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Online since:

May 2011

Authors:

Min Quan Kuang, Shao Yi Wu, Bo Tao Song, Li Li Li

Keywords:

Co2+, Defect Structures, Electron Paramagnetic Resonance (EPR), EPR, Zinc Oxide (ZnO)

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© 2011 Trans Tech Publications Ltd. All Rights Reserved

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