Study of the superconducting ceramic EuBa2Cu3O7-x, by the Mossbauer effect in 119Sn
Andrianov V. A. , Anisimova O. L., Kozin M. G. , Pentin A. Yu., Shpinel' V. S., Ivanenko O. M., Mitsen K. V.
The temperature dependence of the Mossbauer effect in 1,9Sn has been measured in the temperature range 5-300 К for the superconducting ceramic EuBa2 (Cu, _y Sn^,) 307 _ x (у = 0.006). Near Tc the temperature dependence reveals a slightly anomalous behavior which is attributable to the softening of the phonon mode corresponding to the vibrations of Cu atoms.