SURFACE-ANALYSIS OF C-AXIS-ORIENTED YBA2CU3O7-X THIN-FILMS BY QMS, XPS AND LEED - EFFECTS OF IN-VACUUM ANNEALING

被引：12

作者：

TANAKA, S ^{[1
]}

NAKAMURA, T ^{[1
]}

IIYAMA, M ^{[1
]}

YOSHIDA, N ^{[1
]}

TAKANO, S ^{[1
]}

机构：

[1] SUMITOMO ELECT IND LTD, OSAKA LABS, KONOHANA KU, OSAKA 554, JAPAN

来源：

JAPANESE JOURNAL OF APPLIED PHYSICS PART 2-LETTERS & EXPRESS LETTERS | 1991年 / 30卷 / 8B期

关键词：

OXIDE SUPERCONDUCTOR; YBA2CU3O7-X; THIN FILM; LASER ABLATION; QMS; XPS; LEED; SURFACE STRUCTURE; SUPERCONDUCTING PHASE;

D O I：

10.1143/JJAP.30.L1458

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

The effects of in-vacuum annealing on the crystallinity and superconductivity in the surface region of YBa2Cu3O7-x thin films were investigated by QMS, XPS and LEED. Contaminated and disordered layers, which were nonsuperconducting phase, covered the film surface after being exposed to air. Surface contaminants are removed by annealing at 350-degrees-C in ultra high vacuum. The orthorhombic YBa2Cu3O7-x(001) structure and superconducting phase are obtained at the outermost surface after annealing at 350-400-degrees-C.

引用

页码：L1458 / L1461

页数：4

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