High frequency EPR investigations of gadolinium(III)-doped strontium aluminates

T Nakamura, K Kaiya, N Takahashi, T Matsuazawa, M Ohta, C C Rowlands, G M Smith, P C Riedi

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23 Citations (Scopus)

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 S-8(7/2) state ions with a lambda=\D/E\ of 1/3, 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.

Original languageEnglish
Pages (from-to)1721-1723
Number of pages3
JournalPhysical Chemistry Chemical Physics
Volume3
DOIs
Publication statusPublished - 2001

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