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EPR and magnetic susceptibility studies of B2O3⋅BaO glass matrix dopped with iron ions

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

Affiliation

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

Abstract

EPR and magnetic susceptibility measurements have been performed on xFe2O3⋅(1-x) [3B2O3⋅BaO] glasses with 0 < x ≤ 50 mol%. The influence of a gradual increase in Fe2O3 content on the glass matrix (B2O3⋅BaO) structure and magnetic interactions involved iron ions have been discussed. By EPR data, the Fe3+ ions in sites of distorted octahedral symmetry were evidenced. EPR and magnetic susceptibility results indicate that in studied glasses the iron ions participate at the dipolar or/and superexchange magnetic interactions. From magnetic data it was evidenced that the iron ions are in Fe3+ and Fe2+ valence state and are antiferomagnetic coupled, these are depending on the iron content of the glasses..

Keywords

Barium-borate glasses, manganese ions, EPR and magnetic susceptibility.

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

Citation

I. ARDELEAN, M. TODERAŞ, S. FILIP, EPR and magnetic susceptibility studies of B2O3⋅BaO glass matrix dopped with iron ions, Journal of Optoelectronics and Advanced Materials Vol. 10, Iss. 2, pp. 251-255 (2008)