No abstract

A series of single-phase La 3−x Ca 2x Ba 3−x Cu 6 O y (0 ≤ x ≤ 0.75) compounds with tetragonal triple-perovskite structure is studied by Rietveld analysis. For x ≤ 0.43, all of the Ca 2+ ions enter the centre site: the Y 3+ site of the tetragonal YBa 2 Cu 3 O y phase. For 0.43 < x ≤ 0.75, a maximum of about 1/2 of the Y 3+ sites are occupied by Ca 2+ ions and the extra Ca 2+ ions enter the Ba 2+ site. Double plateaux are found between T c and OF (the difference between the occupancy factor of Ca 2+ ions at the Y 3+ site and that of La 3+ ions at the Ba 2+ site). It is suggested that T c of the La-Ca-Ba-Cu-O compounds containing 50 mol% copper atoms with tetragonal triple-perovskite structure can be predicted from the correlation of T c versus OF.

We sputtered a Nb 2 O 5 /Ag/IZO transparent conductive film on PET substrate. The conductivity of transparent conductive film (TCF) was mainly dependent on the Ag layer, and Nb 2 O 5 and IZO were two materials to design an anti-reflection coating. The sheet resistance was 7.9Ω/□ with a 7.9 nm-thickness-Ag layer, and the transmittance was 90.11% at λ=550 nm.