ANALYSIS OF MAGNETIC CRITICAL FIELDS IN IRON-BASED SmFeAsO0.85 HIGH-T-c SUPERCONDUCTOR

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	ANALYSIS OF MAGNETIC CRITICAL FIELDS IN IRON-BASED SmFeAsO0.85 HIGH-T-c SUPERCONDUCTOR
	Ahmad, D ; Song, TK ; Park, IS ; Kim, GC ; Ren, ZA ; Kim, YC
刊名	MODERN PHYSICS LETTERS B
	2011
卷号	25 期号:24 页码:1939
关键词	HIGH-TEMPERATURE SUPERCONDUCTORS HIGH-PRESSURE SYNTHESIS LAYERED SUPERCONDUCTOR IRREVERSIBILITY LINE SINGLE-CRYSTALS 43 K TRANSITION DEPENDENCE COMPOUND VORTICES
ISSN号	0217-9849
通讯作者	Kim, YC: Pusan Natl Univ, Dept Phys, Pusan 609735, South Korea.
中文摘要	The magnetic properties of the newly discovered iron-oxypnictide SmFeAsO0.85 high-T-c superconductor with a T-c of around 55 K were investigated. Bulk SmFeAsO0.85 was prepared by a method for high-pressure synthesis. The lower critical field H-c1 was estimated from the magnetization at low fields; H-c1(0) was measured to be 212 Oe. A linear temperature dependence instead of saturation at low temperatures in H-c1(T) revealed unconventional superconductivity with a nodal gap structure in our SmFeAsO0.85 superconductor. The results showed that the well-known secondary peak in the temperature dependence of the critical current density J(c) is absent in the SmFeAsO0.85 high-T-c superconductor. The irreversibility line B-irr was fitted well by the power law dependence (1 -T/T-c)(n) with n similar to 1.5. This is indicative of the flux creep phenomena in the SmFeAsO0.85 high-T-c superconductor. In addition, within the range of measurement temperatures in this study, no crossover was observed in the temperature dependence of the irreversibility line B-irr which may be due to low anisotropy in our SmFeAsO0.85 superconductor.
收录类别	SCI
资助信息	Korea Government (MOEHRD) [KRF-2007-412-J00901]
语种	英语
公开日期	2013-09-17
内容类型	期刊论文
源URL	[http://ir.iphy.ac.cn/handle/311004/33702]
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	Ahmad, D,Song, TK,Park, IS,et al. ANALYSIS OF MAGNETIC CRITICAL FIELDS IN IRON-BASED SmFeAsO0.85 HIGH-T-c SUPERCONDUCTOR[J]. MODERN PHYSICS LETTERS B,2011,25(24):1939.
APA	Ahmad, D,Song, TK,Park, IS,Kim, GC,Ren, ZA,&Kim, YC.(2011).ANALYSIS OF MAGNETIC CRITICAL FIELDS IN IRON-BASED SmFeAsO0.85 HIGH-T-c SUPERCONDUCTOR.MODERN PHYSICS LETTERS B,25(24),1939.
MLA	Ahmad, D,et al."ANALYSIS OF MAGNETIC CRITICAL FIELDS IN IRON-BASED SmFeAsO0.85 HIGH-T-c SUPERCONDUCTOR".MODERN PHYSICS LETTERS B 25.24(2011):1939.