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Comparative study of the energy levels structure of Cr3+:MIn(WO4)2 with M=Na, K, Rb

N. M. AVRAM1,* , M. G. BRIK2, C. N. AVRAM1

Affiliation

  1. Department of Physics, West University of Timisoara,Bd.V.Parvan,300223 Timisoara, Romania
  2. Institute of Physics, University of Tartu, Riia Street 142,51014 Tartu, Estonia

Abstract

The crystal field parameters and the energy level structure of Cr3+ ion are calculated in the exchange charge model of crystal field using the actual symmetry of the chromium positions. The trivalent chromium ion replaces the In cation in each host matrix and occupies the low site symmetry The calculated energy level schemes for each crystal are compared with each other and with experimental results. The obtained results are in good agreement with experimental data. Covalent effects were shown to play an important role in all considered crystals..

Keywords

Molybdates, Crystal field, Energy levels, Covalence.

Submitted at: Feb. 25, 2008
Accepted at: April 4, 2008

Citation

N. M. AVRAM, M. G. BRIK, C. N. AVRAM, Comparative study of the energy levels structure of Cr3+:MIn(WO4)2 with M=Na, K, Rb, Journal of Optoelectronics and Advanced Materials Vol. 10, Iss. 4, pp. 819-822 (2008)