The single crystal superconducting Bi-2212 whiskers fabrication and their thermal transport properties

In this study, we have fabricated the superconducting single crystal whiskers using glass–ceramic BiSrCaCuO material. The crystallization kinetic studies (crystallization activation energy, Ea, and the Avrami parameter, n,) were carried out using DTA data. The oxygen diffusion energy was calculated using TG data. XRD and SEM analysis of the whiskers showed Bi-2212 phase formation and the c-axis orientation. The in-plane resistivity, ρab, and the out-of-plane resistivity, ρc, properties of the whiskers were investigated. The thermoelectric power, S(T), value between 10 and 300 K is found to be positive, indicating that charge carriers in the whiskers are holes. We analyzed the thermoelectric power as a function of temperature with “Two band model with linear T-term” Linear temperature dependence in the thermal conductivity down to Tc and then a sharp rise just below Tc were obtained.