Molecular-beam epitaxial growth and characterization of Bi-Sr-Co-O thin films

The thin-film growth of Co oxides and layered Bi-Sr-Co-O compounds were studied in detail under an ozone ambient. All samples were produced by a molecular-beam-epitaxy machine modified for the growth of Bi-based high-temperature superconductors. Findings revealed that the Co-232 films had resistivities on the order of 1 milliohm-cm. and that the carriers are holes, similar to those of Bi(sub 2)Sr(sub 2)Ca(sub n-1)Cu(sub n)O(sub 2n+4+delta) superconductors.