Low-temperature synthesis of SmFeAsO0.7F0.3-delta wires with a high transport critical current density

	Low-temperature synthesis of SmFeAsO0.7F0.3-delta wires with a high transport critical current density
	Ma YW(马衍伟)
刊名	SUPERCONDUCTOR SCIENCE & TECHNOLOGY
	2010
通讯作者	马衍伟
中文摘要	Ag-sheathed SmFeAsO0.7F0.3-delta (Sm-1111) superconducting wires were prepared by a one-step solid state reaction at temperatures as low as 850-900 degrees C, instead of commonly used temperatures of 1150-1250 degrees C. The x-ray diffraction pattern of the as-sintered samples is well indexed on the basis of the tetragonal ZrCuSiAs-type structure. We characterized the transport critical current density J(c) of the SmFeAsO0.7F0.3-delta wires in increasing and subsequently decreasing fields, by a resistive four-probe method. A transport J(c) as high as similar to 1300 A cm(-2) at 4.2 K and self-field has been observed for the first time in Sm-1111 type polycrystalline superconductors. The J(c) also shows a rapid depression in small applied fields as well as a magnetic-history dependence, indicating weak-linked grain boundaries. The low-temperature synthesis method can be very beneficial for fabricating the RE-1111 iron oxypnictides in a convenient and safe way.
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	Ag-sheathed SmFeAsO0.7F0.3-delta (Sm-1111) superconducting wires were prepared by a one-step solid state reaction at temperatures as low as 850-900 degrees C, instead of commonly used temperatures of 1150-1250 degrees C. The x-ray diffraction pattern of the as-sintered samples is well indexed on the basis of the tetragonal ZrCuSiAs-type structure. We characterized the transport critical current density J(c) of the SmFeAsO0.7F0.3-delta wires in increasing and subsequently decreasing fields, by a resistive four-probe method. A transport J(c) as high as similar to 1300 A cm(-2) at 4.2 K and self-field has been observed for the first time in Sm-1111 type polycrystalline superconductors. The J(c) also shows a rapid depression in small applied fields as well as a magnetic-history dependence, indicating weak-linked grain boundaries. The low-temperature synthesis method can be very beneficial for fabricating the RE-1111 iron oxypnictides in a convenient and safe way.
内容类型	期刊论文
源URL	[http://ir.iee.ac.cn/handle/311042/423]
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. Low-temperature synthesis of SmFeAsO0.7F0.3-delta wires with a high transport critical current density[J]. SUPERCONDUCTOR SCIENCE & TECHNOLOGY,2010.
APA	马衍伟.(2010).Low-temperature synthesis of SmFeAsO0.7F0.3-delta wires with a high transport critical current density.SUPERCONDUCTOR SCIENCE & TECHNOLOGY.
MLA	马衍伟."Low-temperature synthesis of SmFeAsO0.7F0.3-delta wires with a high transport critical current density".SUPERCONDUCTOR SCIENCE & TECHNOLOGY (2010).