Effect of Pb-, La- and Ti-substitutions on the microstructure and superconducting properties of Bi-2212/Ag composite tapes

Author

Fujii, H. ; Kumakura, H. ; Togano, K.

Author_Institution

Nat. Res. Inst. for Metals, Tsukuba, (Japan). 1st Res. Group, 1G

Volume

11

Issue

1

fYear

2001

fDate

3/1/2001 12:00:00 AM

Firstpage

3050

Lastpage

3053

Abstract

We investigated the effect of Pb-, La- and Ti-substitutions on the microstructure and superconducting properties of Bi-2212/Ag composite tapes. Ti-substituted tapes were more poorly aligned than Pb- and La-substituted tapes. Transition temperature (T_c) could be achieved above 80 K by Pb- and La-substitutions, while T_c decreased below 80 K by Ti-substitution. Transport critical current density (J_c) values were below 10 kA/cm² for the Pb- and Ti-substituted tapes, while the La-substituted tapes showed highest J_c values of 150 kA/cm². The magnetically determined irreversibility field (B_irr) was not improved by substitution. This was independent of elements substituting

Keywords

bismuth compounds; calcium compounds; critical current density (superconductivity); crystal microstructure; high-temperature superconductors; lanthanum compounds; lead compounds; silver; strontium compounds; superconducting tapes; superconducting transition temperature; titanium compounds; 80 K; Bi-2212/Ag composite tapes; Bi₂PbLaTiSr₂CaCu₂O₈-Ag; J_c; La-substitution; Pb-substitution; T_c; Ti-substitution; magnetically determined irreversibility field; microstructure; superconducting properties; transition temperature; transport critical current density; Anisotropic magnetoresistance; Bismuth; Heat treatment; Magnetic fields; Microstructure; Superconducting films; Superconducting transition temperature; Superconductivity; Temperature distribution; Wires;

fLanguage

English

Journal_Title

Applied Superconductivity, IEEE Transactions on

Publisher

ieee

ISSN

1051-8223

Type

jour

DOI

10.1109/77.919706

Filename

919706