Effects of substrate materials on properties of superconducting Bi2Sr2CaCU2O8 epitaxial thin films

被引：17

作者：

Karimoto, S

Kubo, S

Tsuru, K

Suzuki, M

机构：

[1] NTT Basic Research Laboratories, Nippon Telegraph and Tel. Corp., Ibaraki 319-11

来源：

JAPANESE JOURNAL OF APPLIED PHYSICS PART 1-REGULAR PAPERS BRIEF COMMUNICATIONS & REVIEW PAPERS | 1997年 / 36卷 / 1A期

关键词：

Bi2Sr2CaCu2O8; high-T-c thin films; lattice mismatch; substrate materials; surface morphology; internal stress;

D O I：

10.1143/JJAP.36.84

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

We have studied the effects of substrate materials on the surface morphology, crystal quality and electrical properties of Bi2Sr2CaCu2O8 superconducting epitaxial thin films grown on MgO (100), SrTiO3 (100), NdGaO3 (001), LaSrGaO4 (001), LaAlO3 (001) and YAlO3 (001). Films grown on substrates with a large lattice mismatch have a lower T-c and include a number of outgrowth grains. By contrast, films grown on substrates with a small lattice mismatch have a very smooth surface with almost no outgrowth grains or precipitates and have a higher T-c. These results are interpreted in terms of the internal stress caused by the lattice mismatch between the film and substrate.

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页码：84 / 89

页数：6

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