ORIGIN OF CU-RICH PRECIPITATE FORMATION ON SUPERCONDUCTING FILMS - A COMPETITION BETWEEN NUCLEATION, OXIDATION, AND GROWTH-KINETICS

被引：33

作者：

LOCQUET, JP ^{[1
]}

JACCARD, Y ^{[1
]}

GERBER, C ^{[1
]}

MACHLER, E ^{[1
]}

机构：

[1] UNIV NEUCHATEL,INST PHYS,CH-2000 NEUCHATEL,SWITZERLAND

来源：

APPLIED PHYSICS LETTERS | 1993年 / 63卷 / 10期

关键词：

D O I：

10.1063/1.109646

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

We have unraveled the growth mechanism of Cu-rich precipitates on the surface of c-axis-oriented DyBa2CU3O7 thin films. Despite the strong oxidation conditions present, the surface of c-axis DyBa2CU3O7 acts as an ideal nucleation site for Cu2O crystallites, whose (110) planes are parallel to the substrate surface. Once nucleated, they act as effective sinks for the rest of the deposited copper and form large crystals that revert to monoclinic CuO upon cooling. This result has important implications for all currently used thin film growth processes and indicates that smooth surfaces can only be prepared under stringent composition control.

引用

页码：1426 / 1428

页数：3

共 26 条

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