Abstract
Three forms of Nb artificial pinning centers (APC), that is barrier-shaped, layer-shaped and island-shaped pins, were introduced into multifilamentary NbTi/Cu superconductors, and the wires were rolled into different aspect ratios. The critical current densities (Jc∥) were enhanced at high aspect ratio of tape when the broad face of the NbTi/Cu tapes is parallel to the magnetic field for all three types of APC tapes. The highest critical current density increased to more than 4010 A/mm2 at 5 T, 4.2 K in NbTi/Cu tapes with Nb island-shaped. Moreover, the critical field (Hc2) were also changed in multifilamentary NbTi/Cu tapes with highly aligned Nb artificial pinning centers in different forms when the tapes have different aspect ratio as well as have different orientation (parallel and perpendicular) with magnetic field.
| Original language | English |
|---|---|
| Pages (from-to) | 1244-1250 |
| Number of pages | 7 |
| Journal | Physica C: Superconductivity and its Applications |
| Volume | 412-414 |
| Issue number | SPEC. ISS. |
| DOIs | |
| State | Published - Oct 2004 |
| Externally published | Yes |
Keywords
- Artificial pinning center
- Critical current density
- Highly aligned structure
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