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Influence of doping on transport and magnetisation properties of Bi 2212 tapes - vortex pinning; Influence du dopage sur les proprietes de transport et d`aimantation de rubans polycristallins de Bi 2212 - ancrage de vortex

Abstract

Bismuth-based superconductors ar now thoroughly studied and are thought to be one of the best High Critical Temperature Superconductors (HSTC) that could be industrially developed. Though their synthesis is one of the easiest to achieve, their strong anisotropy affects drastically their transport properties under magnetic field, especially in the low field regime. In order to avoid vortices motion, two main methods have been used to introduce pinning centers: irradiation defects or dissemination of non-superconducting particles. An original method of synthesis has been developed in our laboratories, alternating electrolytic depositions and heat treatments with which one can obtain Bi 2212 tapes on silver substrate. Though we have good performances at 77 K, the J{sub c} drops by a factor of 5 at 7 T for B parallel to c-axis. By including Ag, MgO and ZrO{sub 2} particles, we tried to introduce efficient pinning centers in the superconducting matrix. Some of these dopants played also a role on intergranular connectivity. By magnetisation and transport studies, we have been able to improve the situation in these two fields. (author) 195 refs.
Authors:
Publication Date:
Dec 31, 1998
Product Type:
Technical Report
Report Number:
CEA-R-5817
Reference Number:
SCA: 360204; PA: AIX-30:017545; EDB-99:046195; SN: 99002085897
Resource Relation:
Other Information: DN: 195 refs.; PBD: 1998
Subject:
36 MATERIALS SCIENCE; BISMUTH COMPOUNDS; CHEMICAL PREPARATION; GRAIN BOUNDARIES; HEAT TREATMENTS; HIGH-TC SUPERCONDUCTORS; INCLUSIONS; MAGNESIUM OXIDES; MAGNETIZATION; OPTIMIZATION; RUBBERS; SILVER; TEMPERATURE RANGE 0065-0273 K; ZIRCONIUM OXIDES
OSTI ID:
335916
Research Organizations:
CEA Saclay, 91 - Gif-sur-Yvette (France). Section de Recherches de Metallurgie Physique
Country of Origin:
France
Language:
French
Other Identifying Numbers:
Other: ON: DE99620140; TRN: FR9900739017545
Availability:
INIS; OSTI as DE99620140
Submitting Site:
FRN
Size:
226 p.
Announcement Date:

Citation Formats

Zani, L. Influence of doping on transport and magnetisation properties of Bi 2212 tapes - vortex pinning; Influence du dopage sur les proprietes de transport et d`aimantation de rubans polycristallins de Bi 2212 - ancrage de vortex. France: N. p., 1998. Web.
Zani, L. Influence of doping on transport and magnetisation properties of Bi 2212 tapes - vortex pinning; Influence du dopage sur les proprietes de transport et d`aimantation de rubans polycristallins de Bi 2212 - ancrage de vortex. France.
Zani, L. 1998. "Influence of doping on transport and magnetisation properties of Bi 2212 tapes - vortex pinning; Influence du dopage sur les proprietes de transport et d`aimantation de rubans polycristallins de Bi 2212 - ancrage de vortex." France.
@misc{etde_335916,
title = {Influence of doping on transport and magnetisation properties of Bi 2212 tapes - vortex pinning; Influence du dopage sur les proprietes de transport et d`aimantation de rubans polycristallins de Bi 2212 - ancrage de vortex}
author = {Zani, L}
abstractNote = {Bismuth-based superconductors ar now thoroughly studied and are thought to be one of the best High Critical Temperature Superconductors (HSTC) that could be industrially developed. Though their synthesis is one of the easiest to achieve, their strong anisotropy affects drastically their transport properties under magnetic field, especially in the low field regime. In order to avoid vortices motion, two main methods have been used to introduce pinning centers: irradiation defects or dissemination of non-superconducting particles. An original method of synthesis has been developed in our laboratories, alternating electrolytic depositions and heat treatments with which one can obtain Bi 2212 tapes on silver substrate. Though we have good performances at 77 K, the J{sub c} drops by a factor of 5 at 7 T for B parallel to c-axis. By including Ag, MgO and ZrO{sub 2} particles, we tried to introduce efficient pinning centers in the superconducting matrix. Some of these dopants played also a role on intergranular connectivity. By magnetisation and transport studies, we have been able to improve the situation in these two fields. (author) 195 refs.}
place = {France}
year = {1998}
month = {Dec}
}