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
文献类型：期刊论文
| 作者 | Li, Da1,2; Kuang, Qifeng1,2; Men, Xiaoling1,2; Zhang, Bo3; Huang, Jianqi1; Shang, Xiaolei1,2; Yang, Bing1; Yang, Teng1; Li, Zhiwei1,3; Zhang, Zhidong1 |
| 刊名 | JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
 |
| 出版日期 | 2024-11-01 |
| 卷号 | 198页码:98-110 |
| 关键词 | Iron-based hybrid superconductor Superconductivity Superconducting transition Magnetic properties Solution synthesis |
| ISSN号 | 1005-0302 |
| DOI | 10.1016/j.jmst.2024.02.033 |
| 通讯作者 | Li, Da(dali@imr.ac.cn) ; Li, Zhiwei(zweili@lzu.edu.cn) ; Zhang, Zhidong(zdzhang@imr.ac.cn) |
| 英文摘要 | 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. |
| 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 |
| 语种 | 英语 |
| WOS记录号 | WOS:001235514300001 |
| 出版者 | JOURNAL MATER SCI TECHNOL |
| 资助机构 | National Natural Science Foundation of China |
| 源URL |  |
| 专题 | 金属研究所_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. |
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来源：金属研究所
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