Muon spin rotation study of magnetism and superconductivity in BaFe2-xCoxAs2 and Pr1-xSrxFeAsO

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	Muon spin rotation study of magnetism and superconductivity in BaFe2-xCoxAs2 and Pr1-xSrxFeAsO
	Bernhard, C ; Drew, AJ ; Schulz, L ; Malik, VK ; Rossle, M ; Niedermayer, C ; Wolf, T ; Varma, GD ; Mu, G ; Wen, HH ; Liu, H ; Wu, G ; Chen, XH
刊名	NEW JOURNAL OF PHYSICS
	2009
卷号	11
关键词	PHASE-DIAGRAM SMFEASO1-XFX LA2-XSRXCUO4 COEXISTENCE SEPARATION COMPOUND DENSITY ORDER
ISSN号	1367-2630
通讯作者	Bernhard, C: Univ Fribourg, Dept Phys, Chemin Musee 3, CH-1700 Fribourg, Switzerland.
中文摘要	We present a muon spin rotation (mu SR) study of the magnetic and superconducting properties of single crystals of electron-doped BaFe2-xCoxAs2 with x = 0(08, 0.20 and 0.25 (T-c = 9, 25 and 20 K) and of polycrystalline hole-doped Pr1-xSrxFeAsO with x = 0 and 0.2 (T-c = 15 K). In the former series, we observe some interesting parallels with the electron-doped SmFeAsO1-xFx 1111-type system (Drew et al 2009 Nat. Mater. 8 310). In particular, we obtain evidence that strongly disordered static magnetism coexists with superconductivity on a microscopic scale in underdoped samples and even at optimum doping there is a slowing down (or enhancement) of dynamic magnetic correlations below T-c approximate to 25 K. In contrast, for the hole-doped Pr1-xSrxFeAsO samples we obtain evidence for a mesoscopic phase segregation into regions with nearly unperturbed antiferromagnetic (AF) order and others that are nonmagnetic and most likely superconducting. The observed trend resembles the one that was previously reported for hole-doped Ba1-xKxFe2As2 (Aczel et al 2008 Phys. Rev. B 78 214503, Park et al 2009 Phys. Rev. Lett. 102 117006) and thus might be a common property of the hole-doped systems.
收录类别	SCI
资助信息	Schweizer Nationalfonds (SNF) [200020-119784]; Deutsche Forschungsgemeinschaft (DFG) [BE2684/1-3 in FOR538]; Ministry of Science and Technology of China [2006CB60100]
语种	英语
公开日期	2013-09-18
内容类型	期刊论文
源URL	[http://ir.iphy.ac.cn/handle/311004/42437]
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	Bernhard, C,Drew, AJ,Schulz, L,et al. Muon spin rotation study of magnetism and superconductivity in BaFe2-xCoxAs2 and Pr1-xSrxFeAsO[J]. NEW JOURNAL OF PHYSICS,2009,11.
APA	Bernhard, C.,Drew, AJ.,Schulz, L.,Malik, VK.,Rossle, M.,...&Chen, XH.(2009).Muon spin rotation study of magnetism and superconductivity in BaFe2-xCoxAs2 and Pr1-xSrxFeAsO.NEW JOURNAL OF PHYSICS,11.
MLA	Bernhard, C,et al."Muon spin rotation study of magnetism and superconductivity in BaFe2-xCoxAs2 and Pr1-xSrxFeAsO".NEW JOURNAL OF PHYSICS 11(2009).