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.
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页数：6
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