Metal-Insulator Behavior of (Fe-Cu) Interaction in Bi-2223 Ceramic Complex

In this paper, we are reporting about Bismuth based 2223 superconductor which reveals superconductivity at or below critical temperature (Tc) 110 K. Here, adopted the composition formula Bi2Sr2Ca2(Cu1-xFex)3O10+δ for sample (η) Bi2Sr2Ca3 (Cu0.95Fe0.05)3O10+δ with iron concentration (x = 0.05) and iron (Fe) substituted in Cu cite. The measurement of electrical resistance is showing metal-insulator transition at liquid nitrogen temperature, but X-ray diffraction (XRD) showing the Bi-2223 phase with minor existence of Bi-2212 Phase. The particle size is confirmed by field emission electron scanning microscope (FE-SEM). To know about bonding arrangement in the complex, here utilized the Fourier transmission infra-red (FTIR) and found suitable stretching in Fe-O and Cu-O cite at frequency 421 cm−1 and 601.06 cm−1 respectively. Thus, this work is an initial part of superconductivity before transition temperature or superconducting state and it give the information about, how does effect the annealing, grinding, sintering process and calcination time affect at low temperature of Bi-2223 phase in the complex.