Preparation and Characterization of Unconventional Lanthanum Cerium Copuratethin Films Superconductors for Development of Thermoelectric Devices

Abstract

Unconventional and high temperature superconductors are fascinating materials in modern solid state physics and materials science and are widely used in manufacturing of wires, tapes, cables, electrical electordes, etc...... Moreover, these thermoelectric materials (TE) are widely used for manufacturing of transistors and microelectronics. 1 Superconductivity was exhibited by Hgbelow Tc of 4.2 K; (LaBa-CuO) ceramicsat ∼30K;Y-Ba-O at 93 K; Bi and Tlcuprates at 125 K; Hg-based cupratesat164 K. 2 A perfect superconductor elements:Pb, Ta, and Snhave zero electrical resistanceand perfect diamagnetismif cooled below T c . 3 Cuprates are the bases of many superconductors of differentTc: Ba– Ca–CuO);Tc120K [3], Ln 2-x Ce x CuO 4 (Ln = La, Nd, Pr, Sm, or Eu) where electron-doped high-