论文信息 - Surface Morphology of Tl2Ba2Ca2Cu3Oy Thin Films Prepared by Thallium Diffusion Process

Surface Morphology of Tl2Ba2Ca2Cu3Oy Thin Films Prepared by Thallium Diffusion Process

The surface morphology of Tl2Ba2Ca2Cu3Oy thin films prepared by the thallium diffusion process was studied. Ba-Ca-Cu-O rf-sputtered films were annealed with a powder mixture of Tl2O3, BaCuO2, Ca2CuO3 and CuO at a nominal composition of Tl1Ba1Ca3Cu3Oy. The films obtained by two-step annealing (at 900°C for 8 h and at 930°C for 8 min) had uniform appearance over a rather large area and exhibited superconductivity of Tc (zero resistivity)=117 K.

H. Adachi | S. Adachi | Y. Ichikawa | Kentaro Setsune Kentaro Setsune | Kiyotaka Wasa Kiyotaka Wasa

[1] T. Nabatame,et al. Properties of Tl2Ba2Ca2Cu3Ox Thin Films with a Critical Temperature of 122 K Prepared by Excimer Laser Ablation , 1990 .

[2] A. Gossard,et al. Molecular beam epitaxial growth of InAs on a TlBaCaCuO superconducting film , 1990 .

[3] S. Liou,et al. Highly oriented Tl2Ba2Ca2Cu3O10 thin films by pulsed laser evaporation , 1989 .

[4] M. Hirabayashi,et al. Preparation of Tl2Ba2Ca2Cu3Oy Thick Films from Ba-Ca-Cu-O Films , 1988 .

[5] S. Parkin,et al. Tl1Can−1Ba2CunO2n+3 (n= 1,2,3): a new class of crystal structures exhibiting volume superconductivity at up to ≃ 110 K , 1988 .

[6] J. F. Kwak,et al. Sequential electron beam evaporated films of Tl2CaBa2Cu2Oy with zero resistance at 97 K , 1988 .

[7] T. C. Huang,et al. Superconducting Tl‐Ca‐Ba‐Cu‐O thin films with zero resistance at temperatures of up to 120 K , 1988 .