DYNAMICS OF INSITU YBA2CU3O7 SUPERCONDUCTING FILM FORMATION

被引：27

作者：

KWOK, HS ^{[1
]}

YING, QY ^{[1
]}

机构：

[1] SUNY BUFFALO,INST SUPERCONDUCT,BUFFALO,NY 14260

来源：

PHYSICA C | 1991年 / 177卷 / 1-3期

基金：

美国国家科学基金会;

关键词：

D O I：

10.1016/0921-4534(91)90307-K

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

The dynamics of in situ superconducting YBa2Cu3O7 thin film formation was investigated. Emphasis was placed on the temporal dependence of the tetragonal to orthorhombic phase transformation. Using X-ray and in situ resistivity measurements, it was confirmed that during deposition, the tetragonal phase was formed, which was quickly transformed to the superconducting orthorhombic phase by in situ post-deposition oxygenation. The transformation takes place in a very short time by the diffusion of oxygen into the film to fill the vacant O-sites along the Cu-O chains. A one-dimensional diffusion model can fit the data quite well, yielding a diffusivity of 10(-10) cm2/s at 640-degrees-C. It was also shown that complete oxygenation took place in two steps, an isothermal structural phase transformation and an isobaric oxygen uptake.

引用

页码：122 / 128

页数：7

共 34 条

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