(110)-oriented Bi–Sr–Ca–Cu–O superconducting thin films prepared by metalorganic chemical vapor deposition

Abstract

We have studied the superconducting Bi–Sr–Ca–Cu–O thin films prepared by metalorganic chemical vapor deposition (MOCVD). The thin films fabricated on an MgO(110) single crystal substrate show a preferential (110) orientation. The fabrication of (110)-oriented film was dependent on the chemical composition and the existence of a Sr–Ca–Cu–O buffer layer. The zero resistance temperature (Tc0) was obtained at 60 K for the 1 μm thick film and 23 K for the 300 nm thick film. The critical current density (Jc) of this film at 4.2 K was about 1 × 104 A/cm2 for the film of 1 μm thickness.