CRYSTAL-STRUCTURES AT THE INTERFACE BETWEEN A-AXIS ORIENTED YBA2CU3O7-X FILMS AND LAALO3(001) AND SRTIO3(001) SUBSTRATES

被引：5

作者：

TAKAHASHI, H ^{[1
]}

OHATA, K ^{[1
]}

MORISHITA, T ^{[1
]}

机构：

[1] ISTEC,SUPERCONDUCT & RES LAB,KOTO KU,TOKYO 135,JAPAN

来源：

PHYSICA C | 1992年 / 201卷 / 3-4期

关键词：

D O I：

10.1016/0921-4534(92)90473-P

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Crystal structures between a-axis oriented YBa2Cu3O7-x films and LaAlO3(001), SrTiO3(001) substrates have been investigated by cross-sectional transmission electron microscopy. As a whole, the a-axis oriented domains grow on the 3.4-4.5 nm width distorted structures which are formed on both substrates. At the substrate surface, partially hetero-epitaxially grown a-axis oriented YBa2Cu3O7-x is observed. The triclinic distortion of the a-axis oriented YBa2Cu3O7-x structure is observed up to 1.2 nm and 0.6 nm from the LaAlO3(001) and SrTiO3(001) Substrate surfaces, respectively. These triclinic distorted structures of YBa2Cu3O7-x would probably be caused by the structure transformation to reduce the lattice mismatch between the film and substrates (about 3.5% for LaAlO3 and 0.7% for SrTiO3), particularly due to the structural transformation at 435-degrees-C for LaAlO3 under the cooling process.

引用

页码：273 / 278

页数：6

共 13 条

[1] A TEM STUDY OF MICROSTRUCTURES OF YBA2CU3O7-X THIN-FILMS DEPOSITED ON LAA1O3 BY LASER ABLATION [J].