EFFECT OF CARRIER DOPING ON IRREVERSIBILITY FIELD OF
Bi-2212 SUPERCONDUCTORS
Title, author, abstract
- title
-
EFFECT OF CARRIER DOPING ON IRREVERSIBILITY FIELD OF
Bi-2212 SUPERCONDUCTORS
- authors
-
M. Kiuchi1, M.
Tagomori1, H. Yamato1, T. Matsushita1 and
M. Wakata2
1 Department of Computer Science and Electronics, Kyushu
Institute of Technology,
680--4 Kawazu, Iizuka, 820 JAPAN
2 Advanced Technology R \& D Center,
Mitsubishi Electric Corp.,
1--1--57
Miyasita, Sagamihara, Kanagawa, 229, Japan
- abstract
-
The irreversibility field and the critical current density
in Bi-2212 superconductors prepared under the conditions of
various oxygen pressure were measured in the magnetic field
normal and parallel to the $c$-axis. It is found that the
irreversibility field is shifted to higher temperature with
increasing carrier doping. The improvement of the
irreversibility field is attributed to the improvement of
the dimensionality of the superconductor and the
strengthening of flux pinning. These contributions to the
irreversibility field were separated using the flux creep
theory and it is found that the enhancement comes mostly
from the variation in the dimensionality of the
superconductor.
- Original paper appears in
-
9th International Symposium on Superconductivity
October 21--25, 1996
Sapporo, Hokkaido, Japan