The effect of columnar defects on the pinning properties of NdFeAsO0.85 conglomerate particles

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	The effect of columnar defects on the pinning properties of NdFeAsO0.85 conglomerate particles
	Moore, JD ; Cohen, LF ; Yeshurun, Y ; Caplin, AD ; Morrison, K ; Yates, KA ; McGilvery, CM ; Perkins, JM ; McComb, DW ; Trautmann, C ; Ren, ZA ; Yang, J ; Lu, W ; Dong, XL ; Zhao, ZX
刊名	SUPERCONDUCTOR SCIENCE & TECHNOLOGY
	2009
卷号	22 期号:12
关键词	HIGH-TEMPERATURE SUPERCONDUCTORS CU-O CRYSTALS SINGLE-CRYSTALS MAGNETIC-RELAXATION ANISOTROPIES VORTICES
ISSN号	0953-2048
通讯作者	Moore, JD (reprint author), Univ London Imperial Coll Sci Technol & Med, Blackett Lab, Prince Consort Rd, London SW7 2AZ, England.
中文摘要	An oxypnictide superconductor NdFeAsO0.85 sample with transition temperature of 46 K was irradiated with 2 GeV Ta ions at a fluence of 5 x 10(10) ions cm(-2). High resolution transmission electron microscopy study revealed that the irradiation produced columnar-like defects. The effect of these defects on the irreversible magnetization in polycrystalline randomly oriented fragments was studied as a function of field angle and field sweep rate. We find that the critical current density is moderately enhanced at fields below the matching field (similar to 1 T). The pinning enhancement is anisotropic and maximum along the defect direction at 35 K, but becomes more isotropic as the temperature is decreased. The creep rate is suppressed at 35 K and at fields below the matching field, indicating that the columnar defects are efficient pinning sites under these H and T conditions.
收录类别	SCI
资助信息	Engineering Physical Science Research Council [EP/E016243/1]; The Israel Science Foundation (ISF) [499/07]
语种	英语
公开日期	2013-09-23
内容类型	期刊论文
源URL	[http://ir.iphy.ac.cn/handle/311004/45018]
专题	物理研究所_物理所公开发表论文_物理所公开发表论文_期刊论文
推荐引用方式 GB/T 7714	Moore, JD,Cohen, LF,Yeshurun, Y,et al. The effect of columnar defects on the pinning properties of NdFeAsO0.85 conglomerate particles[J]. SUPERCONDUCTOR SCIENCE & TECHNOLOGY,2009,22(12).
APA	Moore, JD.,Cohen, LF.,Yeshurun, Y.,Caplin, AD.,Morrison, K.,...&Zhao, ZX.(2009).The effect of columnar defects on the pinning properties of NdFeAsO0.85 conglomerate particles.SUPERCONDUCTOR SCIENCE & TECHNOLOGY,22(12).
MLA	Moore, JD,et al."The effect of columnar defects on the pinning properties of NdFeAsO0.85 conglomerate particles".SUPERCONDUCTOR SCIENCE & TECHNOLOGY 22.12(2009).