EPR and magnetic susceptibility investigations of Fe containing TeO2-B2O3-SrF2 glasses

Authors
Ardelean, I Peteanu, M Simon, V Ciorcas, F
Citation
I. Ardelean et al., EPR and magnetic susceptibility investigations of Fe containing TeO2-B2O3-SrF2 glasses, J MAT SCI T, 16(6), 2000, pp. 596-600
Citations number
28
Categorie Soggetti
Material Science & Engineering
Journal title
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
ISSN journal
10050302 → ACNP
Volume
16
Issue
6
Year of publication
2000
Pages
596 - 600
Database
ISI
SICI code
1005-0302(200011)16:6<596:EAMSIO>2.0.ZU;2-4
Abstract
Iron ions were used as probes to explore the structural and magnetic proper ties of 70TeO(2). 25B(2)O(3). 5SrF(2) vitreous matrix. The distribution of Fe3+ ions on different structural aggregates was revealed by means of EPR, as depending on Fe2O3 concentration. Strongly distorted octahedral sites we re detected for the isolated paramagnetic ions, and also clusters of Fe ion s especially at high Fe2O3 content of samples. Magnetic susceptibility meas urements evidenced both dipole-dipole and superexchange type interactions i nvolving iron ions. Mixed valence states of iron ions were also detected.