Abstract
Mössbauer parameters of151Eu in Eu1+x Ba2−x Cu3O7+δ have been studied as a function of temperature, forx=0.15 andx=0.25. The areas of the absorption spectra for the two samples are almost equal. This could mean that thef-Mössbauer factor for151Eu at the barium sites is much smaller than that for151Eu at the rare earth sites, i.e. we only observe the spectra of the latter sites. According to this, the fits of the spectra with a single quadrupolar pattern and with two quadrupolar patterns have given equivalent χ2 values.
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Cianchi, L., Del Giallo, F., Pieralli, F. et al. 151Eu Mössbauer studies on Eu1+x Ba2−x Cu3O7+δ oxide systems. Hyperfine Interact 66, 387–391 (1991). https://doi.org/10.1007/BF02395890
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DOI: https://doi.org/10.1007/BF02395890