Strongly enhanced critical current density in MgB2/Fe tapes by stearic acid and stearate doping

	Strongly enhanced critical current density in MgB2/Fe tapes by stearic acid and stearate doping
	Ma YW(马衍伟)
刊名	SUPERCONDUCTOR SCIENCE & TECHNOLOGY
	2007
通讯作者	马衍伟
中文摘要	Fe-sheathed MgB2 tapes with cheap stearic acid, Mg stearate and Zn stearate doping were prepared through the in situ powder-in-tube method. It is found that J(c), H-irr and H-c2 were significantly enhanced by doping. Compared to the pure tapes, J(c) for all the doped samples was improved by more than an order of magnitude in a high-field regime. At 4.2 K, the transport J(c) reached 2.02 x 10(4) A cm(-2) at 10 T for the Zn stearate doped tapes and 3.72 x 10(3) A cm(-2) at 14 T for the stearic acid doped samples, respectively. Moreover, at 20 K, H-irr for the Zn stearate doped tape achieved 10 T, which is comparable to that of the commercial NbTi at 4.2 K. The improvement of J(c)-H properties in doped samples can be attributed to the increase of H-c2 resulting from the incorporation of C atoms into the MgB2 crystal lattice as well as a high density of flux-pinning centres.
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	Fe-sheathed MgB2 tapes with cheap stearic acid, Mg stearate and Zn stearate doping were prepared through the in situ powder-in-tube method. It is found that J(c), H-irr and H-c2 were significantly enhanced by doping. Compared to the pure tapes, J(c) for all the doped samples was improved by more than an order of magnitude in a high-field regime. At 4.2 K, the transport J(c) reached 2.02 x 10(4) A cm(-2) at 10 T for the Zn stearate doped tapes and 3.72 x 10(3) A cm(-2) at 14 T for the stearic acid doped samples, respectively. Moreover, at 20 K, H-irr for the Zn stearate doped tape achieved 10 T, which is comparable to that of the commercial NbTi at 4.2 K. The improvement of J(c)-H properties in doped samples can be attributed to the increase of H-c2 resulting from the incorporation of C atoms into the MgB2 crystal lattice as well as a high density of flux-pinning centres.
内容类型	期刊论文
源URL	[http://ir.iee.ac.cn/handle/311042/319]
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. Strongly enhanced critical current density in MgB2/Fe tapes by stearic acid and stearate doping[J]. SUPERCONDUCTOR SCIENCE & TECHNOLOGY,2007.
APA	马衍伟.(2007).Strongly enhanced critical current density in MgB2/Fe tapes by stearic acid and stearate doping.SUPERCONDUCTOR SCIENCE & TECHNOLOGY.
MLA	马衍伟."Strongly enhanced critical current density in MgB2/Fe tapes by stearic acid and stearate doping".SUPERCONDUCTOR SCIENCE & TECHNOLOGY (2007).