TY - JOUR
T1 - Temperature and magnetic field dependence of the critical current of Bi2Sr2Ca2Cu3Ox tape
AU - Van Der Laan, D. C.
AU - Van Eck, H. J.N.
AU - Ten Haken, B.
AU - Schwartz, J.
AU - Ten Kate, H. H.J.
N1 - Funding Information:
Manuscript received September 17,2000. This work was supported in part by National Science Foundation under contract DMR-9527035, and by FOM (Fundamental Research on Matter), which is subsidised by NWO. D.C. van der Laan: Corresponding author: University of Twente, Enschede, The Netherlands, and National High Magnetic Field Laboratory, Tallahassee, FI 323 10, USA. email: [email protected] H.J.N. van Eck, B. ten Haken and H.H.J. ten Kate: University of Twente, Enschede, The Netherlands. J. Schwartz: National High Magnetic Field Laboratory, Tallahassee, FI 323 10, USA, and Department of Mechanical Engineering, FAMU-FSU College of Engineering, Tallahassee, FL 32310, USA.
PY - 2001/3
Y1 - 2001/3
N2 - In order to improve the understanding of the dominant mechanisms that limit the critical current in high temperature superconductors, the dependence of the critical current on magnetic field and temperature of a Bi2Sr2Ca2Cu3Ox tape has been investigated in detail. The critical current is measurement in magnetic fields up to 8 T, at temperatures ranging from 4.2 K to 70 K. The results are compared with existing models that describe the current path as two parallel systems, one depending on weak links and the other on flux pinning. The critical current at low magnetic fields is reduced drastically by the self-field of the superconductor. At intermediate magnetic fields, the field dependence of the critical current is mainly dominated by weak links, while at higher fields it is dominated by the strong-links current path, and depends on flux pinning. To clarify the models used to describe the measurements, the temperature dependence of the parameters used in the models is studied. The temperature dependence of the parameters used to describe the weak-links current path points out that the weak links are formed by remnant Bi2Sr2Ca1Cu2Ox phase at the grain boundaries.
AB - In order to improve the understanding of the dominant mechanisms that limit the critical current in high temperature superconductors, the dependence of the critical current on magnetic field and temperature of a Bi2Sr2Ca2Cu3Ox tape has been investigated in detail. The critical current is measurement in magnetic fields up to 8 T, at temperatures ranging from 4.2 K to 70 K. The results are compared with existing models that describe the current path as two parallel systems, one depending on weak links and the other on flux pinning. The critical current at low magnetic fields is reduced drastically by the self-field of the superconductor. At intermediate magnetic fields, the field dependence of the critical current is mainly dominated by weak links, while at higher fields it is dominated by the strong-links current path, and depends on flux pinning. To clarify the models used to describe the measurements, the temperature dependence of the parameters used in the models is studied. The temperature dependence of the parameters used to describe the weak-links current path points out that the weak links are formed by remnant Bi2Sr2Ca1Cu2Ox phase at the grain boundaries.
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U2 - 10.1109/77.919779
DO - 10.1109/77.919779
M3 - Conference article
AN - SCOPUS:0035267943
SN - 1051-8223
VL - 11
SP - 3345
EP - 3348
JO - IEEE Transactions on Applied Superconductivity
JF - IEEE Transactions on Applied Superconductivity
IS - 1 III
T2 - 2000 Applied Superconductivity Conference
Y2 - 17 September 2000 through 22 September 2000
ER -