Heat treatment effects on the superconducting properties of Ag-doped SrKFeAs compounds

	Heat treatment effects on the superconducting properties of Ag-doped SrKFeAs compounds
	Ma YW(马衍伟)
刊名	SCIENCE CHINA-PHYSICS MECHANICS & ASTRONOMY
	2010
通讯作者	马衍伟
中文摘要	The superconducting properties of polycrystalline Sr0.6K0.4Fe2As2 were strongly influenced by Ag doping (Supercond. Sci. Technol. 23 (2010) 025027). Ag addition is mainly dominated by silver diffusing, so the annealing process is one of the essential factors to achieve high quality Ag doped Sr0.6K0.4Fe2As2. In this paper, the optimal annealing conditions were studied for Ag doped Sr0.6K0.4Fe2As2 bulks prepared by a one-step solid reaction method. It is found that the annealing temperature has a strong influence on the superconducting properties, especially on the critical current density J(c). As a result, higher heat treatment temperature (similar to 900 degrees C) is helpful in diffusing Ag and reducing the impurity phase gathered together to improve the grain connectivity. In contrast, low-temperature sintering is counterproductive for Ag doped samples. These results clearly suggest that annealing at similar to 900 degrees C is necessary for obtaining high J(c) Ag-doped samples.
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	The superconducting properties of polycrystalline Sr0.6K0.4Fe2As2 were strongly influenced by Ag doping (Supercond. Sci. Technol. 23 (2010) 025027). Ag addition is mainly dominated by silver diffusing, so the annealing process is one of the essential factors to achieve high quality Ag doped Sr0.6K0.4Fe2As2. In this paper, the optimal annealing conditions were studied for Ag doped Sr0.6K0.4Fe2As2 bulks prepared by a one-step solid reaction method. It is found that the annealing temperature has a strong influence on the superconducting properties, especially on the critical current density J(c). As a result, higher heat treatment temperature (similar to 900 degrees C) is helpful in diffusing Ag and reducing the impurity phase gathered together to improve the grain connectivity. In contrast, low-temperature sintering is counterproductive for Ag doped samples. These results clearly suggest that annealing at similar to 900 degrees C is necessary for obtaining high J(c) Ag-doped samples.
内容类型	期刊论文
源URL	[http://ir.iee.ac.cn/handle/311042/367]
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. Heat treatment effects on the superconducting properties of Ag-doped SrKFeAs compounds[J]. SCIENCE CHINA-PHYSICS MECHANICS & ASTRONOMY,2010.
APA	马衍伟.(2010).Heat treatment effects on the superconducting properties of Ag-doped SrKFeAs compounds.SCIENCE CHINA-PHYSICS MECHANICS & ASTRONOMY.
MLA	马衍伟."Heat treatment effects on the superconducting properties of Ag-doped SrKFeAs compounds".SCIENCE CHINA-PHYSICS MECHANICS & ASTRONOMY (2010).