Abstract
High-Tc superconductor tapes with nominal compositions of Bi1.8Pb0.4Sr2Ca2.2Cu3O 10-x (Bi-2223) and (Tl,Cr0.15)Sr2(Ca0.9,Pr0.1)Cu2 O7-x (Tl-1212) were fabricated using the powder-in-tube method. The Tczero's of the tapes, which were subjected to various thermo-mechanical treatments, ranged from 100-103 K for the Bi-2223/Ag tapes and 84-86 K for the Tl-1212/Ag tapes. Their transport critical current densities in low magnetic fields (0.15 T) were compared. All the tapes are dominated by weak links where this is more severe in the Tl-1212/Ag tapes. No significant anisotropic transport properties were observed in Tl-1212/Ag tapes when the magnetic field was applied perpendicular or parallel to the tape plane (i.e. Jc(H⊥)/Jc(H∥) = 0.75-1.0). The Bi-2223/Ag tapes however show a pronounced anisotropic transport properties in applied magnetic field (i.e. Jc(H⊥)/Jc(H∥) = 0.15-0.65). This can be associated with the microstructural difference between these two types of tapes. Scanning electron micrographs reveal the slightly aligned grains in the Bi-based tapes while randomly orientated grains were observed in the Tl-based tapes.
| Original language | English |
|---|---|
| Pages (from-to) | 547-552 |
| Number of pages | 6 |
| Journal | Physica C: Superconductivity and its Applications |
| Volume | 377 |
| Issue number | 4 |
| DOIs | |
| Publication status | Published - 15 Sep 2002 |
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Keywords
- Anisotropic current density
- Strong links
- Tapes
ASJC Scopus subject areas
- Condensed Matter Physics
Cite this
Comparative study on the transport critical current density of Bi-2223 and Tl-1212 Ag-sheathed superconductor tapes in low magnetic fields. / Lau, K. T.; Chen, S. K.; Abd. Shukor, Roslan.
In: Physica C: Superconductivity and its Applications, Vol. 377, No. 4, 15.09.2002, p. 547-552.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Comparative study on the transport critical current density of Bi-2223 and Tl-1212 Ag-sheathed superconductor tapes in low magnetic fields
AU - Lau, K. T.
AU - Chen, S. K.
AU - Abd. Shukor, Roslan
PY - 2002/9/15
Y1 - 2002/9/15
N2 - High-Tc superconductor tapes with nominal compositions of Bi1.8Pb0.4Sr2Ca2.2Cu3O 10-x (Bi-2223) and (Tl,Cr0.15)Sr2(Ca0.9,Pr0.1)Cu2 O7-x (Tl-1212) were fabricated using the powder-in-tube method. The Tczero's of the tapes, which were subjected to various thermo-mechanical treatments, ranged from 100-103 K for the Bi-2223/Ag tapes and 84-86 K for the Tl-1212/Ag tapes. Their transport critical current densities in low magnetic fields (0.15 T) were compared. All the tapes are dominated by weak links where this is more severe in the Tl-1212/Ag tapes. No significant anisotropic transport properties were observed in Tl-1212/Ag tapes when the magnetic field was applied perpendicular or parallel to the tape plane (i.e. Jc(H⊥)/Jc(H∥) = 0.75-1.0). The Bi-2223/Ag tapes however show a pronounced anisotropic transport properties in applied magnetic field (i.e. Jc(H⊥)/Jc(H∥) = 0.15-0.65). This can be associated with the microstructural difference between these two types of tapes. Scanning electron micrographs reveal the slightly aligned grains in the Bi-based tapes while randomly orientated grains were observed in the Tl-based tapes.
AB - High-Tc superconductor tapes with nominal compositions of Bi1.8Pb0.4Sr2Ca2.2Cu3O 10-x (Bi-2223) and (Tl,Cr0.15)Sr2(Ca0.9,Pr0.1)Cu2 O7-x (Tl-1212) were fabricated using the powder-in-tube method. The Tczero's of the tapes, which were subjected to various thermo-mechanical treatments, ranged from 100-103 K for the Bi-2223/Ag tapes and 84-86 K for the Tl-1212/Ag tapes. Their transport critical current densities in low magnetic fields (0.15 T) were compared. All the tapes are dominated by weak links where this is more severe in the Tl-1212/Ag tapes. No significant anisotropic transport properties were observed in Tl-1212/Ag tapes when the magnetic field was applied perpendicular or parallel to the tape plane (i.e. Jc(H⊥)/Jc(H∥) = 0.75-1.0). The Bi-2223/Ag tapes however show a pronounced anisotropic transport properties in applied magnetic field (i.e. Jc(H⊥)/Jc(H∥) = 0.15-0.65). This can be associated with the microstructural difference between these two types of tapes. Scanning electron micrographs reveal the slightly aligned grains in the Bi-based tapes while randomly orientated grains were observed in the Tl-based tapes.
KW - Anisotropic current density
KW - Strong links
KW - Tapes
UR - http://www.scopus.com/inward/record.url?scp=0037106565&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=0037106565&partnerID=8YFLogxK
U2 - 10.1016/S0921-4534(01)01316-8
DO - 10.1016/S0921-4534(01)01316-8
M3 - Article
VL - 377
SP - 547
EP - 552
JO - Physica C: Superconductivity and its Applications
JF - Physica C: Superconductivity and its Applications
SN - 0921-4534
IS - 4
ER -