The novel superconducting homologous series CuBa₂Ca_n-1Cu_nO_2n+2+δ (i.e., Cu-12(n-1)n) have been introduced. The compounds can be synthesized only under high pressure high temperature so far. The physical properties of Cu-12(n-1)n are briefly compared with other high T_c superconductors, while the advantages of the Cu-12(n-1)n superconductors in terms of simple composition, higher T_c and better high temperature high magnetic field properties are stressed.

high pressure synthesis  /  high T_c superconductor  /  Cu-12(n-1)n homologous series