Magnetic phase present in YBa2(Cu1−xFe x )3O6+δ oxides
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The Mössbauer study of57Fe: YBa2Cu3O6+δ oxides was very important to establish the preferential occupation of Cu(1) site by Fe at very low concentrations. Recent determination of antiferromagnetic ordering for Cu moments in Cu(2) sites (T≈450 K) and our early observation of a small proportion of a magnetic phase at room temperature for Fe:YBa2Cu3O6 lead us to perform systematic studies of YBa2(Cu1−xFe x )3O6 withx=0.005, 0.03, 0.05, 0.10 and 0.15 in order to obtain information about the iron occupation of Cu(2) sites.
KeywordsOxide Iron Thin Film Small Proportion Systematic Study
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