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Crystal field studies of the MgAl2O4 : Ni2+ ground and excited state absorption

M. G. BRIK1,2, N. M. AVRAM3,* , C. N. AVRAM3

Affiliation

  1. Fukui Institute for Fundamental Chemistry, Kyoto University, 34-4 Takano Nishihiraki-cho, Sakyo-ku, Kyoto, 606-8103, Japan
  2. School of Science and Technology, Kwansei Gakuin University, 2-1 Gakuen, Sanda, Hyogo 669-1337, Japan
  3. Department of Physics, West University of Timisoara, Bd. V. Parvan No. 4, 300223, Timisoara, Romania

Abstract

The exchange charge model of crystal field theory has been used to analyze the ground and excited state absorption of octahedra ly coordinated Ni2+ ion in MgAl2O4. The parameters of the crystal field acting on the Ni2+ ion are calculated from the crystal structure data. The obtained energy level schemes were compared with experimental ground and excited state absorption spectra; a good agreement with experimental data is demonstrated. From the analysis of the experimental spectra, the Stokes shift, the effective phonon energy and the zero-phonon line position all were evaluated..

Keywords

Crystal field theory, 3d-ions, Ground and excited state absorption.

Submitted at: Jan. 18, 2006
Accepted at: March 23, 2006

Citation

M. G. BRIK, N. M. AVRAM, C. N. AVRAM, Crystal field studies of the MgAl2O4 : Ni2+ ground and excited state absorption, Journal of Optoelectronics and Advanced Materials Vol. 8, Iss. 2, pp. 731-736 (2006)