Abstract
| Original language | English |
|---|---|
| Article number | 104514 |
| Journal | Physical review B: Condensed matter and materials physics |
| Volume | 77 |
| Issue number | 10 |
| DOIs | |
| Publication status | Published - 2008 |
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Keywords
- IR-59873
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Limits to the critical current in Bi2Sr2Ca2Cu3Ox tape conductors : The parallel path model. / van der Laan, D.C.; Schwartz, J.; ten Haken, B.; Dhallé, M.; van Eck, H.J.N.
In: Physical review B: Condensed matter and materials physics, Vol. 77, No. 10, 104514, 2008.Research output: Contribution to journal › Article › Academic
TY - JOUR
T1 - Limits to the critical current in Bi2Sr2Ca2Cu3Ox tape conductors
T2 - The parallel path model
AU - van der Laan, D.C.
AU - Schwartz, J.
AU - ten Haken, B.
AU - Dhallé, M.
AU - van Eck, H.J.N.
PY - 2008
Y1 - 2008
N2 - An extensive overview of a model that describes current flow and dissipation in high-quality Bi2Sr2Ca2Cu3Ox superconducting tapes is provided. The parallel path model is based on a superconducting current running in two distinct parallel paths. One of the current paths is formed by grains that are connected at angles below 4°. Dissipation in this strongly linked backbone occurs within the grains and is well described by classical flux-creep theory. The other current path, the weakly linked network, is formed by superconducting grains that are connected at intermediate angles (4°–8°) where dissipation occurs at the grain boundaries. However, grain boundary dissipation in this weakly linked current path does not occur through Josephson weak links, but just as in the strongly linked backbone, is well described by classical flux creep. The results of several experiments on Bi2Sr2Ca2Cu3Ox tapes and single-grained powders that strongly support the parallel path model are presented. The critical current density of Bi2Sr2Ca2Cu3Ox tapes can be scaled as a function of magnetic field angle over the temperature range from 15 K to 77 K. Expressions based on classical flux creep are introduced to describe the dependence of the critical current density of Bi2Sr2Ca2Cu3Ox tapes on the magnetic field and temperature.
AB - An extensive overview of a model that describes current flow and dissipation in high-quality Bi2Sr2Ca2Cu3Ox superconducting tapes is provided. The parallel path model is based on a superconducting current running in two distinct parallel paths. One of the current paths is formed by grains that are connected at angles below 4°. Dissipation in this strongly linked backbone occurs within the grains and is well described by classical flux-creep theory. The other current path, the weakly linked network, is formed by superconducting grains that are connected at intermediate angles (4°–8°) where dissipation occurs at the grain boundaries. However, grain boundary dissipation in this weakly linked current path does not occur through Josephson weak links, but just as in the strongly linked backbone, is well described by classical flux creep. The results of several experiments on Bi2Sr2Ca2Cu3Ox tapes and single-grained powders that strongly support the parallel path model are presented. The critical current density of Bi2Sr2Ca2Cu3Ox tapes can be scaled as a function of magnetic field angle over the temperature range from 15 K to 77 K. Expressions based on classical flux creep are introduced to describe the dependence of the critical current density of Bi2Sr2Ca2Cu3Ox tapes on the magnetic field and temperature.
KW - IR-59873
U2 - 10.1103/PhysRevB.77.104514
DO - 10.1103/PhysRevB.77.104514
M3 - Article
VL - 77
JO - Physical review B: Condensed matter and materials physics
JF - Physical review B: Condensed matter and materials physics
SN - 1098-0121
IS - 10
M1 - 104514
ER -