Abstract
Neutron powder diffraction study of YBa2(Cu1-xFe x )3O7-δ was carried out for a series of samples with 0.005≦x≦0.12. The results obtained suggest that Fe substitutes for Cu at both, Cu1 and Cu2 sites with equal probabilities. There is a significant number (9%) of vacancies at the Cu1 site. This number is decreasing with an increasing concentration of Fe in a specimen. The oxygen content does not vary forx<0.08, but increases to about 7.06 for 12% Fe. There is a very low probability that Fe substitutes for Ba.
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Balagurov, A.M., Piechota, J., Pajaczkowska, A. et al. On the problem of Fe-substitution in YBa2Cu3O7-δ: a neutron powder diffraction study. Z. Physik B - Condensed Matter 76, 153–158 (1989). https://doi.org/10.1007/BF01312678
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DOI: https://doi.org/10.1007/BF01312678