Electrical anisotropy in Bi-Sr-Ca-Cu-O thin films prepared on (110) SrTiO3 by metalorganic chemical vapor deposition

Abstract

Highly (119) oriented Bi‐Sr‐Ca‐Cu‐O thin films with the transition temperature as high as 70 K on (110) and 5° off (110) SrTiO₃ substrates were prepared by metalorganic chemical vapor deposition. The normal state resistivity along the [11̄0] direction (tilted about 45° to the a‐b plane of the film) was 200 times larger than that measured along the [001] direction (parallel to the a‐b plane of the film) for the film prepared on a 5° off oriented (110) SrTiO₃ substrate. The anomalous drop of the resistivity near the T_c,0 was observed in the film prepared on a (110) SrTiO₃ substrate.