THIN-FILM STRUCTURE OF YBA2CU3O7-DELTA ON (001) MGO SUBSTRATE STUDIED BY TEM

被引：9

作者：

SUZUKI, H

KUROSAWA, H

MIYAGAWA, K

HIROTSU, Y

ERA, M

YAMASHITA, T

YAMANE, H

HIRAI, T

机构：

[1] TOHOKU UNIV, INST MAT RES, SENDAI, MIYAGI 980, JAPAN

[2] NAGAOKA UNIV TECHNOL, DEPT MECH ENGN, NAGAOKA 94021, JAPAN

[3] NAGAOKA UNIV TECHNOL, DEPT ELECTR, NAGAOKA 94021, JAPAN

来源：

JAPANESE JOURNAL OF APPLIED PHYSICS PART 2-LETTERS & EXPRESS LETTERS | 1990年 / 29卷 / 09期

关键词：

AC Josephson effect; DC Josephson effect; Grain-boundary junction; Lattice imaging; MOCVD; YBCO thin film; Small-angle grain boundary; TEM observation;

D O I：

10.1143/JJAP.29.L1648

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

A plan-view TEM observation was made for YBa2Cu3O7-δ (YBCO) thin films prepared by MOCVD on (001) MgO substrates. For the TEM observation, the MgO substrate plates were ion-thinned before the YBCO deposition. The YBCO thin films were found to be polycrystalline with a grain size of about 0.5µm. Most of the YBCO grains are grown with their [001] axes nearly normal to the MgO substrate plane. Between the neighboring YBCO grains, a small-angle misorientation was observed quite frequently. Most of the misorientation angles measured by selected-area electron diffraction were less than about 5 degrees. At the small-angle grain boundaries, a nearly periodic array of dislocations was observed in the high-resolution lattice images. The AC and DC Josephson effects of YBCO thin film bridges reported previously are discussed in relation to the small-angle grain boundaries. © 1990 The Japan Society of Applied Physics.

引用

页码：L1648 / L1651

页数：4

共 10 条

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