Observation of the Antiferromagnetic Ordering of Cu(2) Sites in YBa2(Cu1-xFex)3O7-y

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  • Observation of the Antiferromagnetic Ordering of Cu(2) Sites in YBa<SUB>2</SUB>(Cu<SUB>1−<I>x</I></SUB>Fe<I><SUB>x</SUB></I>)<SUB>3</SUB>O<SUB>7−<I>y</I></SUB>
  • Observation of the Antiferromagnetic Or
  • Observation of the Antiferromagnetic Ordering of Cu(2) Sites in YBa<sub>2</sub>(Cu<sub>1-<i>x</i></sub>Fe<sub><i>x</i></sub>)<sub>3</sub>O<sub>7-<i>y</i></sub>

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Nuclear resonance spectra with the internal field of about 90 kOe were observed in zero external magnetic field in YBa2(Cu1−xFex)3O7−y with x≥0.15, just above the concentration x where superconductivity disappears. As the resonance width and the e2qQ satellite patterns are similar to the NMR spectrum associated with antiferromagnetic Cu(2) moments in the tetragonal YBa2Cu3Oδ (δ\lesssim6.4), the observed spectrum indicates that almost the same antiferromagnetic ordering with the pure YBa2Cu3Oδ (δ\lesssim6.4) also appears in the YBa2(Cu1−xFex)3O7−y system when the superconductivity ceases with the substitution of Fe atoms.

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