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EPR INVESTIGATION OF MANGANESE IONS IN 70TeO225B2O35MO (MO SrO or SrF2) GLASS MATRICES

I. Ardelean1,* , M. Peteanu1, N. Muresan1, V. Ioncu1, F. Ciorcas-Delille2

Affiliation

  1. Faculty of Physics, Babe-Bolyai University, 400048 Cluj-Napoca, Romania
  2. C.E.A-D.R.F.M.C. SPINTEC, 38527 Grenoble, Cedex 9, France

Abstract

EPR of Mn2+ ions revealed their distribution on different structural units in 70TeO225B2O35MO (MO SrO or SrF2) glass matrices. The number of isolated Mn2+ ions, participating at the geff » 4.3 resonance increase up to 1 mol % MnO and after that decreases to nil for 10 mol % MnO and was not affected by replacing of SrO with SrF2. The number of Mn2+ ions participating at the geff » 2.0 resonance increases when the MnO content rises. In the case of the matrix with SrO the number of these ions are only a little higher than that of the matrix with SrF2 for 5 £ x £ 30 mol %, but for x > 30 mol % their content are higher in case of the matrix with SrF2. From line-width composition dependence the effect of replacing of SrO with SrF2 was to accentuate the clusterizing tendencies of manganese ions when increasing the MnO content, attested by a more pronounced narrowing of the line at geff » 2.0..

Keywords

EPR, Manganese ion, Glass matrix.

Submitted at: June 14, 2005
Accepted at: Sept. 22, 2005

Citation

I. Ardelean, M. Peteanu, N. Muresan, V. Ioncu, F. Ciorcas-Delille, EPR INVESTIGATION OF MANGANESE IONS IN 70TeO225B2O35MO (MO SrO or SrF2) GLASS MATRICES, Journal of Optoelectronics and Advanced Materials Vol. 7, Iss. 5, pp. 2661-2666 (2005)