Introduction of pinning centers in superconducting YBCO thick film prepared by liquid phase epitaxy

Author

Kitamura, T. ; Taniguchi, S. ; Hirabayashi, I. ; Tanaka, S. ; Sugawara, Y. ; Ikuhara, Y.

Author_Institution

Supercond. Res. Lab., ISTEC, Nagoya, Japan

Volume

7

Issue

2

fYear

1997

fDate

6/1/1997 12:00:00 AM

Firstpage

1392

Lastpage

1395

Abstract

YBa/sub 2/Cu/sub 3/O/sub 7-y/ (YBCO) thick films were prepared by liquid phase epitaxy on crystalline substrates. The microstructure of the films is dominated by the misfit of the constant between the YBCO and the substrate. Misfit dislocations are introduced to release the stress due to lattice misfit between the YBCO and the substrate. The residual stress caused other kinds of defects in the YBCO films. The defects introduced to the YBCO films behave as effective pinning centers to enhance the pinning force in the magnetic field.

Keywords

barium compounds; crystal microstructure; dislocations; flux pinning; high-temperature superconductors; interface structure; internal stresses; lattice constants; liquid phase epitaxial growth; stress relaxation; superconducting epitaxial layers; yttrium compounds; YBCO/substrate misfit; YBa/sub 2/Cu/sub 3/O/sub 7/; YBa/sub 2/Cu/sub 3/O/sub 7/ thick films; crystalline substrates; defects; effective pinning centers; lattice misfit; liquid phase epitaxy; magnetic field; microstructure; misfit dislocations; pinning centers; pinning force; residual stress; stress release; superconducting YBCO thick film; Crystal microstructure; Crystallization; Epitaxial growth; Magnetic films; Residual stresses; Substrates; Superconducting epitaxial layers; Superconducting films; Thick films; Yttrium barium copper oxide;

fLanguage

English

Journal_Title

Applied Superconductivity, IEEE Transactions on

Publisher

ieee

ISSN

1051-8223

Type

jour

DOI

10.1109/77.620830

Filename

620830