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5 7 Fe γ-resonance (Mossbauer) study of Bi-2212 HTSC was performed in the 30-295 K temperature range in order to investigate vibrations of the Cu-sites in the CuO 2 sub-lattice planes. Anomalous changing of their mean-square displacement has not been observed in the vicinity of temperature of a transition to superconducting state. Great attention was paid to the accuracy of measurements.
National Institute for Physical, Radio and Technical Measurements (VNIIFTRI), Mendeleevo, Moscow Region, 141570, Russia Semenov Institute of Chemical Physics RAS, 4, ul. Kosygina, Moscow, 119977, Russia
National Institute for Physical, Radio and Technical Measurements (VNIIFTRI), Mendeleevo, Moscow Region, 141570, Russia Semenov Institute of Chemical Physics RAS, 4, ul. Kosygina, Moscow, 119977, Russia