Property research on YBa₂Cu₃O_7-δ superconductor system prepared by rapid cooling

To understand the cooling rate effect on superconductivity of high-temperature superconductor YBa₂Cu₃O_7-δ, solid-state reaction and rapid cooling method are used to prepare YBa₂Cu₃O_7-δ sample. The R-T tests showed that with the acceleration of annealing,the zero resistance temperature T_c0 of samples decreases, superconductivity becomes weakened,transition width △T_c becomes wider, superconducting quality becomes worse. When the rapid annealing degrees, sample losses superconductivity. Cooling rate has an iraportant impact on superconductivity.