Pb substitution effects on the critical current density in MgO doped Bi2212 crystals

Author

Sasakura, Hiroki ; Miura, Osuke ; Ito, Daisuke

Author_Institution

Graduate Sch. of Eng., Tokyo Metropolitan Univ., Japan

Volume

11

Issue

1

fYear

2001

fDate

3/1/2001 12:00:00 AM

Firstpage

3912

Lastpage

3915

Abstract

For heavily Pb substituted Bi2212 crystals with MgO doping, we found not only the critical current density J_c anisotropy decreasing to a half as much as Pb free MgO doped crystals but J_c and irreversibility field B_irr improvement. Apparent pinning potential U₀* derived from flux creep experiments for these crystals also increased. Those results suggest that the effect of MgO doping is more pronounced by decreasing the J_c anisotropy of crystals. Dislocation increase in the Pb substituted Bi2212 crystals due to MgO doping was observed with a transmission electron microscope

Keywords

bismuth compounds; calcium compounds; critical current density (superconductivity); dislocations; flux creep; high-temperature superconductors; lead compounds; magnesium compounds; strontium compounds; transmission electron microscopy; BiPbSrCaCuO:MgO; HTSC; MgO doped Bi2212 crystals; Pb substitution effects; apparent pinning potential; critical current density; dislocation; flux creep experiments; irreversibility field; transmission electron microscopy; Anisotropic magnetoresistance; Creep; Critical current density; Crystal microstructure; Doping; Electrons; Magnetic field measurement; Magnetization; Powders; Temperature;

fLanguage

English

Journal_Title

Applied Superconductivity, IEEE Transactions on

Publisher

ieee

ISSN

1051-8223

Type

jour

DOI

10.1109/77.919926

Filename

919926