High frequency EPR investigations of gadolinium(III)-doped strontium aluminates
- 22 January 2001
- journal article
- Published by Royal Society of Chemistry (RSC) in Physical Chemistry Chemical Physics
- Vol. 3 (9) , 1721-1723
- https://doi.org/10.1039/b008251l
Abstract
The high frequency EPR spectra of SrAl2O4 doped with gadolinium(III) as a probe are discussed, focusing on the sites occupied by the lanthanides. This is because the emission due to europium(II) of SrAl2O4:Eu,Ln (Ln: lanthanides) is significantly affected by such substitution. The EPR spectrum of SrAl2O4:Dy,Gd showed a pattern typical for two overlapping resonances of 8S7/2 state ions with a λ = ∣D/E∣ of ⅓, suggesting that the gadolinium(III) sites have very low symmetry. From a comparison of the experimental and simulated EPR spectra it was found that both gadolinium(III) and europium(II) ions occupy strontium sites.Keywords
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