Abstract
The results of studies of shear elastic properties of a high-temperature superconducting (HTSC) of YBa2Cu3O7 - x ceramics in the vicinity of the phase transition to the superconducting state at at a temperature of 91.3 K, as well as at room temperature of 293 K are presented. For the first time, a local increase in the shear nonlinear acoustic parameter N was investigated. Experimental studies of the linear and nonlinear elastic properties of HTSC ceramics YBa2Cu3O7 - x in the region of the superconducting transition showed that the electronic phase transition has significant influence on its elastic properties. Based on the results of experimental measurements linear and nonlinear elastic parameters were determined both at room temperature and in the region phase transition temperature.
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