Abstract
In this work, we have measured the dynamic process of thermal expansion (DPTE) of some Bi-based high-T c superconductor samples in the temperature range 80∼130K and found that the dynamic thermal expansion of Bi-based superconductor samples (Bi 2Sr 2Ca 2Cu 3O y (T c=105K) and Bi 1.8Pb 0.4Sr 2Ca 2Cu 3.15Ge 0.05O y (T c=102K)) change suddenly across T c. The mechanism of this phenomenon is left to be studied.
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