Abstract

The shear elastic properties of YBa₂Cu₃O_{7 –x} high-temperature superconducting (HTSC) ceramics are studied near the superconducting transition at a temperature of 91.3 K and room temperature of 293 K. For the first time, a local increase in shear nonlinear acoustic parameter N in the region of the phase transition temperature was detected. Experimental studies of the linear and nonlinear elastic properties of YBa₂Cu₃O_{7 –x} HTSC ceramics in the region of the superconducting transition showed that the electronic phase transition has a significant effect on its elastic properties. Based on experimental measurements, linear and nonlinear elastic parameters are determined both at room temperature and in the region of the phase transition.

中文翻译：

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超导转变区HTSC陶瓷的剪切弹性

摘要

研究了YBa ₂ Cu ₃ O _{7 – x}高温超导（HTSC）陶瓷在超导转变附近的剪切弹性特性，温度为91.3 K，室温为293K。这是第一次，局部剪切增加检测到相变温度范围内的非线性声学参数N。YBa ₂ Cu ₃ O _{7 – x}的线性和非线性弹性特性的实验研究HTSC陶瓷在超导过渡区显示，电子相变对其弹性性能有重要影响。根据实验测量，可以在室温下和相变区域内确定线性和非线性弹性参数。