(110)-ORIENTED BI-SR-CA-CU-O SUPERCONDUCTING THIN-FILMS PREPARED BY METALORGANIC CHEMICAL VAPOR-DEPOSITION

We have studied the superconducting Bi-Sr-Ca-Cu-O thin films prepared by metalorganic chemical vapor deposition (MOCVD). The thin films fabr icated on an MgO(110) single crystal substrate show a preferential (11 0) orientation. The fabrication of (110)-oriented film was dependent o n the chemical composition and the existence of a Sr-Ca-Cu-O buffer la yer. The zero resistance temperature (T(c0)) was obtained at 60 K for the 1 mum thick film and 23 K for the 300 nm thick film. The critical current density (J(c)) of this film at 4.2 K was about 1 X 10(4) A/cm2 for the film of 1 mum thickness.