DocumentCode :
1756963
Title :
Preparation and Properties of Sr0.9La0.1CuO2 Thin Films Grown on BaySr1-yTiO3 Layers
Author :
Yilun He ; Ito, Masataka ; Sakuma, Keita ; Ueda, Kenji ; Asano, Hidefumi
Author_Institution :
Nagoya Univ., Nagoya, Japan
Volume :
25
Issue :
3
fYear :
2015
fDate :
42156
Firstpage :
1
Lastpage :
4
Abstract :
Epitaxial thin films of electron-doped infinite-layer (IL) cuprate superconductor Sr1-xLaxCuO 2 (SLCO, 
) 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 BaySr1-yTiO3 with 
, 0.55, and 0.7, prepared on (001) (La0.18Sr0.82)(Al0.59 Ta0.41)O3 (LSAT) substrates, were used as epitaxial buffer layers to induce different types of strain in SLCO. For the tensile strained SLCO films on Ba0.55Sr0.45TiO3 and on Ba0.7Sr0.3TiO3 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 0.4Sr0.6TiO3 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.
Keywords :
annealing; barium compounds; buffer layers; compressive strength; epitaxial growth; high-temperature superconductors; internal stresses; lanthanum compounds; sputter deposition; strontium compounds; superconducting epitaxial layers; tensile strength; (La0.18Sr0.82)(Al0.59Ta0.41)O3; Sr0.9La0.1CuO2-BaySr1-yTiO3; compressively strained SLCO films; dc magnetron sputtering; electrical properties; electron-doped infinite-layer cuprate superconductor; epitaxial buffer layers; epitaxial thin films; excess apical-oxygen removal; short time reduction annealing; strong thickness dependences; structural properties; tensile strained SLCO films; Annealing; Buffer layers; Lattices; Strain; Superconducting epitaxial layers; Superconducting thin films; Infinite-layer compound; strain effect; superconducting thin films;
fLanguage :
English
Journal_Title :
Applied Superconductivity, IEEE Transactions on
Publisher :
ieee
ISSN :
1051-8223
Type :
jour
DOI :
10.1109/TASC.2014.2380824
Filename :
6985575
Link To Document :
