Peak effect and superconducting properties of SmFeAsO0.8F0.2 wires

被引：50

作者：

Chen, Y. L. ^{[1
]}

Cui, Y. J. ^{[1
]}

Yang, Y. ^{[1
]}

Zhang, Y. ^{[1
]}

Wang, L. ^{[1
]}

Cheng, C. H. ^{[2
]}

Sorrell, C. ^{[2
]}

Zhao, Y. ^{[1
,2
]}

机构：

[1] SW Jiaotong Univ, SRDC, Minist Educ China, Key Lab Magnet Levitat Technol & Maglev Trains, Sichuan 610031, Peoples R China

[2] Univ New S Wales, Sch Mat Sci & Engn, Sydney, NSW 2052, Australia

来源：

SUPERCONDUCTOR SCIENCE & TECHNOLOGY | 2008年 / 21卷 / 11期

基金：

澳大利亚研究理事会; 美国国家科学基金会;

关键词：

D O I：

10.1088/0953-2048/21/11/115014

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Ta-sheathed SmFeAsO0.8F0.2 superconducting wires with T-c = 52.5 K have been fabricated using the powder-in-tube (PIT) method and the superconducting properties of the wires have been investigated. The wires exhibit a very large intragrain critical current density at a temperature below 30 K. A peak effect with maximal J(c) = 0.6 MA cm(-2) at 10 K under 6 T field was observed. The peak field H-pear is strongly temperature-dependent. A severe weak-link effect depresses the development of global supercurrent owing to a very short coherence length. The wires also show a power law temperature dependence for the irreversibility line with H-irr congruent to (1-T/T-c)(1.5). The H-T phase diagram was found to be similar to that of other superconducting cuprates.

引用

页数：6

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