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Electron paramagnetic resonance study of manganese ions in P2O5-TeO2 glass matrix

I. ARDELEAN1,* , M. TODERAŞ1,2, C. HOREA1,2, S. FILIP2

Affiliation

  1. Faculty of Physics, Babes-Bolyai University, 400048, Romania
  2. Faculty of Science, Department of Physics, Oradea University, 410087, Romania

Abstract

Electron paramagnetic resonance measurements on xMnO·(1-x)[P2O5·TeO2] glasses with 0 < x ≤ 35 mol. % are reported. In all concentration range of studied glasses are evidenced the EPR absorption line centered at geff ≈ 2.0 characteristic to the Mn2+. Octahedral symmetric sites, tetragonally distorted, were detected. The progressive clustering of manganese ions was evidenced when the MnO content increased. The line at geff ≈ 2.0 have a hyperfine structure for 0 < x ≤ 1 mol%, suggesting the presence of isolated Mn2+. The MnO content dependence of line-width for geff ≈ 2.0 resonance line suggest, that for x > 1 mol% are present the dipolar and/or superexchange magnetic interactions. It is important to notice that the spectra do not present the geff ≈ 4.3 absorption line characteristic for Mn2+ isolated ions..

Keywords

Tellurite-phosphate glasses, Manganese ion, EPR.

Submitted at: Feb. 25, 2007
Accepted at: Feb. 18, 2008

Citation

I. ARDELEAN, M. TODERAŞ, C. HOREA, S. FILIP, Electron paramagnetic resonance study of manganese ions in P2O5-TeO2 glass matrix, Journal of Optoelectronics and Advanced Materials Vol. 10, Iss. 2, pp. 243-245 (2008)