Effects of heating conditions on the microstructure and superconducting properties of Sr0.6K0.4Fe2As2

	Effects of heating conditions on the microstructure and superconducting properties of Sr0.6K0.4Fe2As2
	Ma YW(马衍伟)
刊名	SUPERCONDUCTOR SCIENCE & TECHNOLOGY
	2010
通讯作者	马衍伟
中文摘要	We report a study on the effect of sintering temperature on the microstructure and superconducting properties of Sr0.6K0.4Fe2As2 bulk samples, which were synthesized by the one-step solid reaction method. The heat treatment temperatures were varied from 700 to 900 degrees C in an argon atmosphere. It was found that the annealing temperature had little influence on the critical temperature T-c. However, the irreversibility field H-irr and critical current density J(c) were significantly affected by the sintering temperature; for instance, the J(c) at both 5 and 20 K increased with increasing the synthesis temperatures up to 850 degrees C, and then further increasing the temperature hardly affected the J(c) improvement. In addition, samples heat treated at temperatures over 850 degrees C exhibited a very weak J(c)-field dependence, especially at 20 K. Characterizations revealed that high temperature sintering resulted in large grains with fewer impurities.
学科主题	材料合成与加工工艺
收录类别	1
公开日期	2010-09-29
附注	We report a study on the effect of sintering temperature on the microstructure and superconducting properties of Sr0.6K0.4Fe2As2 bulk samples, which were synthesized by the one-step solid reaction method. The heat treatment temperatures were varied from 700 to 900 degrees C in an argon atmosphere. It was found that the annealing temperature had little influence on the critical temperature T-c. However, the irreversibility field H-irr and critical current density J(c) were significantly affected by the sintering temperature; for instance, the J(c) at both 5 and 20 K increased with increasing the synthesis temperatures up to 850 degrees C, and then further increasing the temperature hardly affected the J(c) improvement. In addition, samples heat treated at temperatures over 850 degrees C exhibited a very weak J(c)-field dependence, especially at 20 K. Characterizations revealed that high temperature sintering resulted in large grains with fewer impurities.
内容类型	期刊论文
源URL	[http://ir.iee.ac.cn/handle/311042/399]
专题	电工研究所_超导材料及强磁场科学研究组_超导材料及强磁场科学研究组_期刊论文
推荐引用方式 GB/T 7714	Ma YW. Effects of heating conditions on the microstructure and superconducting properties of Sr0.6K0.4Fe2As2[J]. SUPERCONDUCTOR SCIENCE & TECHNOLOGY,2010.
APA	马衍伟.(2010).Effects of heating conditions on the microstructure and superconducting properties of Sr0.6K0.4Fe2As2.SUPERCONDUCTOR SCIENCE & TECHNOLOGY.
MLA	马衍伟."Effects of heating conditions on the microstructure and superconducting properties of Sr0.6K0.4Fe2As2".SUPERCONDUCTOR SCIENCE & TECHNOLOGY (2010).