Magnetic suppression for a possible Fe-poor organic-inorganic hybrid superconductor Fe 14 Se 16 (tepa) 0.8 (tepa = tetraethylenepentamine) with a superconducting transition at42 K

doi:10.1016/j.jmst.2024.02.033

IMR OpenIR

	Magnetic suppression for a possible Fe-poor organic-inorganic hybrid superconductor Fe 14 Se 16 (tepa) 0.8 (tepa = tetraethylenepentamine) with a superconducting transition at42 K
	Li, Da 1,2; Kuang, Qifeng 1,2; Men, Xiaoling 1,2; Zhang, Bo 3; Huang, Jianqi 1; Shang, Xiaolei 1,2; Yang, Bing 1; Yang, Teng 1; Li, Zhiwei 1,3; Zhang, Zhidong 1
通讯作者	Li, Da(dali@imr.ac.cn) ; Li, Zhiwei(zweili@lzu.edu.cn) ; Zhang, Zhidong(zdzhang@imr.ac.cn)
	2024-11-01
发表期刊	JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
ISSN	1005-0302
卷号	198 页码:98-110
摘要	Composition/structure-dependent superconductivity for FeSe-based superconductors attracted great attention not only due to their high superconducting transition temperatures ( TC ), but also for understanding the origin of iron-based superconductivity. Here, we report a new Fe-poor organic-inorganic hybrid material Fe14 Se16 (tepa)0.8 with a paramagnetic-diamagnetic transition at -42 K grown by a hightemperature organic-solution-phase method with soluble iron/selenium sources in a tepa solution, alternative to previous intercalation strategies. The Fe14 Se16 (tepa)0.8 phase is in a tetragonal layered hybrid structure with a nanoplate shape. Composition analyses reveal a Fe-poor characteristic of the hybrid in contrast to previous FeSe-intercalated superconductor, and selected area electron diffraction pattern is featured by Fe3 Se4 superstructures with a root 2 x root 2 of Fe vacancy order. Ab initio density functional calculations show that minus Fe3 Se4 ions are stable in the hybrid and -0.25e-/Fe0.75 Se is obviously larger than the reported values of approximately 0.2e-/FeSe in other FeSe-intercalated superconductors. Typical hysteresis loops and temperature dependence of dc/ac susceptibilities of the Fe14 Se16 (tepa)0.8 measured below -42 K suggest a presence of the Meissner effect in this material. Effects of synthesis conditions on structures and magnetic properties of the hybrids show a magnetic evolution from a long-range ferrimagnetic (FIM) order of Fe14 Se16 (tepa) to a coexistence of FIM and superconducting (SC) orders of Fe14 Se16 (tepa)0.9 and an SC order of Fe14 Se16 (tepa)0.8 . X-ray absorption spectrum (XAS) confirms the presence of ferric/ferrous irons. M & ouml;ssbauer studies reveal that the high- TC superconductivity originates from a suppression of the FIM order through tuning the spin states of irons from high-spin Fe3 + ( S = 5/2) and Fe2 + ( S = 2) in the Fe14 Se16 (tepa) to low-spin Fe3 + ( S = 1/2) and Fe2 + ( S = 0) in the Fe14 Se16 (tepa)0.8 . Although no zero resistance is detected even at a temperature of 2 K, the resistivity at 2 K decreases by more than 1600 times compared to that in a normal state calculated by a variable range hopping (VRH) model, suggesting that the high- TC superconductivity of Fe14 Se16 (tepa)0.8 is possible. (c) 2024 Published by Elsevier Ltd on behalf of The editorial office of Journal of Materials Science & Technology.
关键词	Iron-based hybrid superconductor Superconductivity Superconducting transition Magnetic properties Solution synthesis
资助者	National Natural Science Foundation of China
DOI	10.1016/j.jmst.2024.02.033
收录类别	SCI
语种	英语
资助项目	National Natural Science Foundation of China[52371203] ; National Natural Science Foundation of China[51971221] ; National Natural Science Foundation of China[52031014]
WOS研究方向	Materials Science ; Metallurgy & Metallurgical Engineering
WOS类目	Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
WOS记录号	WOS:001235514300001
出版者	JOURNAL MATER SCI TECHNOL
引用统计	被引频次：3[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/186594
专题	中国科学院金属研究所
通讯作者	Li, Da; Li, Zhiwei; Zhang, Zhidong
作者单位	1.Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, Shenyang 110016, Peoples R China 2.Univ Sci & Technol China, Sch Mat Sci & Engn, Shenyang 110016, Peoples R China 3.Lanzhou Univ, Key Lab Magnetism & Magnet Mat, Minist Educ, Key Lab Special Funct Mat & Struct Design, Lanzhou 730000, Peoples R China
推荐引用方式 GB/T 7714	Li, Da,Kuang, Qifeng,Men, Xiaoling,et al. Magnetic suppression for a possible Fe-poor organic-inorganic hybrid superconductor Fe 14 Se 16 (tepa) 0.8 (tepa = tetraethylenepentamine) with a superconducting transition at42 K[J]. JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY,2024,198:98-110.
APA	Li, Da.,Kuang, Qifeng.,Men, Xiaoling.,Zhang, Bo.,Huang, Jianqi.,...&Zhang, Zhidong.(2024).Magnetic suppression for a possible Fe-poor organic-inorganic hybrid superconductor Fe 14 Se 16 (tepa) 0.8 (tepa = tetraethylenepentamine) with a superconducting transition at42 K.JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY,198,98-110.
MLA	Li, Da,et al."Magnetic suppression for a possible Fe-poor organic-inorganic hybrid superconductor Fe 14 Se 16 (tepa) 0.8 (tepa = tetraethylenepentamine) with a superconducting transition at42 K".JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY 198(2024):98-110.