The growth mode and microstructure of Ag-doped YBa2Cu3O7-δ thin films prepared by dual beam pulsed-laser deposition

被引：9

作者：

Xu, SY ^{[1
]}

Ong, CK ^{[1
]}

You, LP ^{[1
]}

Li, J ^{[1
]}

Wang, SJ ^{[1
]}

机构：

[1] Natl Univ Singapore, Ctr Superconducting & Magnet Mat, Singapore 119260, Singapore

来源：

PHYSICA C-SUPERCONDUCTIVITY AND ITS APPLICATIONS | 2000年 / 341卷

关键词：

Amorphous materials - Crystal microstructure - Crystal orientation - Diffusion in solids - Doping (additives) - Film growth - Polycrystalline materials - Pulsed laser deposition - Silver - Substrates - Superconducting films - Thermal effects;

D O I：

10.1016/S0921-4534(00)01075-3

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Ag-doped c-axis YBa2Cu3O7-delta thin films were fabricated by using dual-beam pulsed-laser deposition. When a small amount of silver was doped in the film grown at 700 degreesC, the J(c) value was obviously enhanced. The temperature dependence of J(c) was found proportional to (1-T/T-c0)(3/2) at T close to T-c0. In the films grown at 730 degreesC, we observed long bar-like structures with lengths in tens of mum, oriented along or at 45 degrees to the a/b axes of the film. The bars consisted mainly a-axis YBCO grains and a mixture of polycrystalline and amorphous oxides. Defects on substrate surface and growth temperature were found dominating in formation of the bars, which could be attributed to a Ag-assisted diffusion mechanism during the deposition process.

引用

页码：2345 / 2346

页数：2

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