Abstract
Epitaxial thin films of electron-doped infinite-layer (IL) cuprate superconductor Sr 1-x La x CuO 2 (SLCO, x = 0.1) were grown by dc magnetron sputtering, and their structural and electrical properties were investigated systematically by changing the reduction annealing period under vacuum to remove excess apical-oxygen and the SLCO film thickness. Thin films of Ba y Sr 1-y TiO 3 with y = 0.4, 0.55, and 0.7, prepared on (001) (La 0.18 Sr 0.82 )(Al 0.59 Ta 0.41 )O 3 (LSAT) substrates, were used as epitaxial buffer layers to induce different types of strain in SLCO. For the tensile strained SLCO films on Ba 0.55 Sr 0.45 TiO 3 and on Ba 0.7 Sr 0.3 TiO 3 layers, short time (several minutes) reduction annealing was found to be effective for the removal of excess apical-oxygen and the appearance of superconductivity, whereas the reduction annealing was less effective for the compressively strained SLCO films on Ba 0.4 Sr 0.6 TiO 3 layers. Moreover, strong thickness dependences of superconducting properties have been observed for tensile strained layers. Based on these results, the strain and reduction effects of the SLCO film properties are discussed.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.