High transport currents in mechanically reinforced MgB2 wires

被引：149

作者：

Goldacker, W ^{[1
]}

Schlachter, SI ^{[1
]}

Zimmer, S ^{[1
]}

Reiner, H ^{[1
]}

机构：

[1] Forschungszentrum Karlsruhe, Phys Tech Inst, D-76021 Karlsruhe, Germany

来源：

SUPERCONDUCTOR SCIENCE & TECHNOLOGY | 2001年 / 14卷 / 09期

关键词：

D O I：

10.1088/0953-2048/14/9/331

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

We prepared and characterized monofilamentary MgB2 wires with a mechanically reinforced composite sheath of Ta(Nb)/Cu/steel, which leads to dense filaments and correspondingly high transport currents up to J(c) = 10(5) A cm(-2) at 4.2 K under self-field. The reproducibility of the measured transport currents was excellent and did not depend on the wire diameter. Using different precursors, commercial reacted powder or an unreacted Mg/B powder mixture, a strong influence on the pinning behaviour and the irreversibility field was observed. The critical transport current density showed a nearly linear temperature dependency for all wires being still 52 kA cm(-2) at 20 K and 23 kA cm(-2) at 30 K. Detailed data for J(c)(B, T) and T-c(B) were measured.

引用

页码：787 / 793

页数：7

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