Magnetization loops and non-scaling behavior of flux pinning force of Fe1+y Te1-x Se (x) studied by numerical simulation

doi:10.1088/1361-6668/ac87d9

	Magnetization loops and non-scaling behavior of flux pinning force of Fe1+y Te1-x Se (x) studied by numerical simulation
	Huang, Xiaofei 2; Sun, Yue 2; Pan, Yongqiang 1,2; Shi, Zhixiang 2
刊名	SUPERCONDUCTOR SCIENCE & TECHNOLOGY
	2022-10-01
卷号	35
关键词	iron-based superconductors numerical calculation flux pinning second magnetic peak effect
ISSN号	0953-2048
DOI	10.1088/1361-6668/ac87d9
通讯作者	Pan, Yongqiang(panyongqiang1203@163.com) ; Shi, Zhixiang(zxshi@seu.edu.cn)
英文摘要	The magnetization of type-II superconductors has usually been described using the critical state models (CSMs). However, CSMs do not consider the time-dependent magnetic relaxation. In this work, to study the influence of magnetic relaxation on the magnetic hysteresis loops (MHLs), critical current density J (c), and flux pinning force F (p), a numerical method proposed by (Qin and Yao 1996 Phys. Rev. B 54 7536) was adopted and extended to the quasi-two-dimensional case. MHLs at different temperatures measured by using applied field with different sweeping rates can be well reproduced. The critical current density after relaxation J (s), and F (p) can also fit the experimental results well. Based on the numerical simulation, the non-scaling behavior of field-dependent normalized pinning force has been proven to be due to the magnetic relaxation. By comparing the normalized pinning force with the Dew-Hughes model, the dominant pinning type in Fe1+y Te0.6Se0.4 has been confirmed to be the volume Delta kappa pinning. In addition, the second peak effect is found to be related to the flux lattice transition from elastic lattice to plastic lattice (E-P transition).
资助项目	National Key R&D Program of China[2018YFA0704300] ; Strategic Priority Research Program (B) of the Chinese Academy of Sciences[XDB25000000] ; Fundamental Research Funds for the Central University[2242022R10076]
WOS关键词	SUPERCONDUCTIVITY
WOS研究方向	Physics
语种	英语
出版者	IOP Publishing Ltd
WOS记录号	WOS:000841992700001
资助机构	National Key R&D Program of China ; Strategic Priority Research Program (B) of the Chinese Academy of Sciences ; Fundamental Research Funds for the Central University
内容类型	期刊论文
源URL	[http://ir.hfcas.ac.cn:8080/handle/334002/132039]
专题	中国科学院合肥物质科学研究院
通讯作者	Pan, Yongqiang; Shi, Zhixiang
作者单位	1.Chinese Acad Sci, Inst Solid State Phys, Key Lab Mat Phys, Hefei 230031, Peoples R China 2.Southeast Univ, Sch Phys, Nanjing 211189, Peoples R China
推荐引用方式 GB/T 7714	Huang, Xiaofei,Sun, Yue,Pan, Yongqiang,et al. Magnetization loops and non-scaling behavior of flux pinning force of Fe1+y Te1-x Se (x) studied by numerical simulation[J]. SUPERCONDUCTOR SCIENCE & TECHNOLOGY,2022,35.
APA	Huang, Xiaofei,Sun, Yue,Pan, Yongqiang,&Shi, Zhixiang.(2022).Magnetization loops and non-scaling behavior of flux pinning force of Fe1+y Te1-x Se (x) studied by numerical simulation.SUPERCONDUCTOR SCIENCE & TECHNOLOGY,35.
MLA	Huang, Xiaofei,et al."Magnetization loops and non-scaling behavior of flux pinning force of Fe1+y Te1-x Se (x) studied by numerical simulation".SUPERCONDUCTOR SCIENCE & TECHNOLOGY 35(2022).