Vortex images on Ba1-xKxFe2As2 observed directly by magnetic force microscopy

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	Vortex images on Ba1-xKxFe2As2 observed directly by magnetic force microscopy
	Yang, H ; Shen, B ; Wang, ZY ; Shan, L ; Ren, C ; Wen, HH
刊名	PHYSICAL REVIEW B
	2012
卷号	85 期号:1
关键词	SUPERCONDUCTIVITY YBA2CU3O7-DELTA CRYSTALS
ISSN号	1098-0121
通讯作者	Yang, H (reprint author), Nanjing Univ, Ctr Superconducting Phys & Mat, Natl Lab Solid State Microstruct, Nanjing 210093, Jiangsu, Peoples R China.
中文摘要	The vortex states on optimally doped Ba0.6K0.4Fe2As2 and underdoped Ba0.77K0.23Fe2As2 single crystals are imaged by magnetic force microscopy at various magnetic fields below 100 Oe. Local triangular vortex clusters are observed in optimally doped samples. The vortices are more ordered than those in Ba(Fe1-xCox)(2)As-2, and the calculated pinning force per unit length is about 1 order of magnitude weaker than that in optimally Co-doped 122 at the same magnetic field, indicating that the Co doping at the Fe sites induces stronger pinning. The proportion of six-neighbored vortices to the total amount increases quickly with increasing magnetic field, and the estimated value reaches 100% at several tesla. Vortex chains are also found in some local regions, which enhance the pinning force as well as the critical current density. Lines of vortex chains are observed in underdoped samples, and they may have originated from the strong pinning near the twin boundaries arising from the structural transition.
收录类别	SCI
资助信息	NSF of China; Ministry of Science and Technology of China [2011CBA00102, 2010CB923002, 2012CB821403]; PAPD; Chinese Academy of Sciences
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/311004/46581]
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	Yang, H,Shen, B,Wang, ZY,et al. Vortex images on Ba1-xKxFe2As2 observed directly by magnetic force microscopy[J]. PHYSICAL REVIEW B,2012,85(1).
APA	Yang, H,Shen, B,Wang, ZY,Shan, L,Ren, C,&Wen, HH.(2012).Vortex images on Ba1-xKxFe2As2 observed directly by magnetic force microscopy.PHYSICAL REVIEW B,85(1).
MLA	Yang, H,et al."Vortex images on Ba1-xKxFe2As2 observed directly by magnetic force microscopy".PHYSICAL REVIEW B 85.1(2012).