Crystalline Alignment of Tl_2Ba_2CaCu_2O_δ Thin Films Annealed in a Sealed Capsule

概要

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C-axis oriented Tl_2Ba_2CaCu_2O_δ thin films have been prepared on MgO with good reproducibility by annealing them in an alumina capsule sealed with a gold gasket. The crystalline alignment of the thin films depends on the annealing temperature, the Tl content of the pellets used for Tl compensation, and the film thickness. The electric properties of the thin films depend on their alignment. The critical temperature T_c of c-axis oriented thin films is above 90 K, whereas that of randomly oriented thin films is below 85 K. The highest T_c is 108 K and the highest critical current density J_c is 4.5×10^5 A/cm^2.
社団法人応用物理学会の論文
1996-03-15