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VOLUME 46 (1987) | ISSUE 9 | PAGE 364
Mossbauer-spectrum temperature-dependence anomalies of YBa2Cu3O9-y
Mossbauer spectroscopy has been used to study the compound YBa2Cu309 _ y (yzz2) with impurity 57Fe nuclei. This compound exhibits a superconductivity (Tc = 93 K). Measurements of the temperature dependence over the range 77-300 К reveal an anomalous behavior of the probability for the effect,/, (Τ), near Tc.