Preparation and Properties of Sr0.9La0.1CuO2 Thin Films Grown on BaySr1-yTiO3 Layers

Yilun He, Masataka Ito, Keita Sakuma, Kenji Ueda, Hidefumi Asano

研究成果: Article査読

2 被引用数 (Scopus)

抄録

Epitaxial thin films of electron-doped infinite-layer (IL) cuprate superconductor Sr1-xLaxCuO 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 BaySr1-yTiO3 with y = 0.4, 0.55, and 0.7, prepared on (001) (La0.18Sr0.82)(Al0.59Ta0.41)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 SLCO films on Ba0.55Sr0.45TiO3 and on Ba0.7Sr0.3TiO3 layers. Based on these results, the strain and reduction effects of the SLCO film properties are discussed.

本文言語English
論文番号6985575
ジャーナルIEEE Transactions on Applied Superconductivity
25
3
DOI
出版ステータスPublished - 2015 6月 1
外部発表はい

ASJC Scopus subject areas

  • 電子材料、光学材料、および磁性材料
  • 凝縮系物理学
  • 電子工学および電気工学

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