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Iebole M, Braccini V, Bernini C, Malagoli A, Manca N, Martinelli A, Cialone M, Putti M, Singh SJ, Latronico G, Mele P. Fe(Se,Te) Thin Films Deposited through Pulsed Laser Ablation from Spark Plasma Sintered Targets. MATERIALS (BASEL, SWITZERLAND) 2024; 17:2594. [PMID: 38893859 PMCID: PMC11173624 DOI: 10.3390/ma17112594] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/24/2024] [Revised: 05/08/2024] [Accepted: 05/16/2024] [Indexed: 06/21/2024]
Abstract
Iron-based superconductors are under study for their potential for high-field applications due to their excellent superconducting properties such as low structural anisotropy, large upper critical fields and low field dependence of the critical current density. Between them, Fe(Se,Te) is simple to be synthesized and can be fabricated as a coated conductor through laser ablation on simple metallic templates. In order to make all the steps simple and fast, we have applied the spark plasma sintering technique to synthesize bulk Fe(Se,Te) to obtain quite dense polycrystals in a very short time. The resulting polycrystals are very well connected and show excellent superconducting properties, with a critical temperature onset of about 16 K. In addition, when used as targets for pulsed laser ablation, good thin films are obtained with a critical current density above 105 A cm-2 up to 16 T.
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Affiliation(s)
- Michela Iebole
- Shibaura Institute of Technology, Omiya Campus, 307 Fukasaku, Minuma-ku, Saitama City 337-8570, Japan; (M.I.); (G.L.); (P.M.)
- Physics Department, University of Genova, Via Dodecaneso 33, 16146 Genova, Italy; (M.C.)
- CNR—SPIN Genova, Corso Perrone 24, 16152 Genova, Italy; (C.B.); (A.M.); (N.M.); (A.M.)
- RAISE Ecosystem, 16152 Genova, Italy
| | - Valeria Braccini
- CNR—SPIN Genova, Corso Perrone 24, 16152 Genova, Italy; (C.B.); (A.M.); (N.M.); (A.M.)
- RAISE Ecosystem, 16152 Genova, Italy
| | - Cristina Bernini
- CNR—SPIN Genova, Corso Perrone 24, 16152 Genova, Italy; (C.B.); (A.M.); (N.M.); (A.M.)
- RAISE Ecosystem, 16152 Genova, Italy
| | - Andrea Malagoli
- CNR—SPIN Genova, Corso Perrone 24, 16152 Genova, Italy; (C.B.); (A.M.); (N.M.); (A.M.)
- RAISE Ecosystem, 16152 Genova, Italy
| | - Nicola Manca
- CNR—SPIN Genova, Corso Perrone 24, 16152 Genova, Italy; (C.B.); (A.M.); (N.M.); (A.M.)
- RAISE Ecosystem, 16152 Genova, Italy
| | - Alberto Martinelli
- CNR—SPIN Genova, Corso Perrone 24, 16152 Genova, Italy; (C.B.); (A.M.); (N.M.); (A.M.)
| | - Matteo Cialone
- Physics Department, University of Genova, Via Dodecaneso 33, 16146 Genova, Italy; (M.C.)
- CNR—SPIN Genova, Corso Perrone 24, 16152 Genova, Italy; (C.B.); (A.M.); (N.M.); (A.M.)
| | - Marina Putti
- Physics Department, University of Genova, Via Dodecaneso 33, 16146 Genova, Italy; (M.C.)
- CNR—SPIN Genova, Corso Perrone 24, 16152 Genova, Italy; (C.B.); (A.M.); (N.M.); (A.M.)
| | - Shiv J. Singh
- Institute of High-Pressure Physics (IHPP), Polish Academy of Sciences, Sokołowska 29/37, 01-142 Warsaw, Poland;
| | - Giovanna Latronico
- Shibaura Institute of Technology, Omiya Campus, 307 Fukasaku, Minuma-ku, Saitama City 337-8570, Japan; (M.I.); (G.L.); (P.M.)
- International Research Fellow of Japan Society for the Promotion of Science (JSPS), 5 Chome-3-1 Kojimachi, Chiyoda City, Tokyo 102-0083, Japan
| | - Paolo Mele
- Shibaura Institute of Technology, Omiya Campus, 307 Fukasaku, Minuma-ku, Saitama City 337-8570, Japan; (M.I.); (G.L.); (P.M.)
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Liu J, Zhang S, Li M, Sang L, Li Z, Cheng Z, Zhao W, Feng J, Li C, Zhang P, Dou S, Wang X, Zhou L. Boosting Superconducting Properties of Fe(Se, Te) via Dual-Oscillation Phenomena Induced by Fluorine Doping. ACS APPLIED MATERIALS & INTERFACES 2019; 11:18825-18832. [PMID: 31007006 DOI: 10.1021/acsami.9b02469] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Fluorine-doped Fe(Se, Te) has been successfully synthesized using the melting method. A dual-oscillation effect was found in the F-doped sample, which combined both microstructural oscillation and chemical compositional oscillation. The microstructural oscillation could be attributed to alternate growth of tetragonal β-Fe(Se, Te) and hexagonal δ-Fe(Se, Te), which formed a pearlite-like structure and led to the enhancement of δ l flux pinning due to the alternating distributed nonsuperconducting δ-Fe(Se, Te) phase. The chemical compositional oscillations in β-Fe(Se, Te) phase were because of the inhomogeneously distributed Se and Te, which changes the pinning mechanism from surface pinning in the undoped sample to Δκ pinning in the 5% F-doped one. As a result, the critical current, upper critical field, and thermally activated flux-flow activation energy of FeSe0.45Te0.5F0.05 were enhanced by 7, 2, and 3 times, respectively. Our work revealed the physical insights into F-doping resulting in high-performance Fe(Se, Te) superconductors and inspired a new approach to optimize superconductivities in iron-based superconductors through phase and element manipulations.
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Affiliation(s)
- Jixing Liu
- School of Materials Science and Engineering , Northeastern University , Shenyang 110819 , China
- Superconducting Materials Research Center , Northwest Institute for Nonferrous Metal Research , Xi'an 710016 , China
- Institute for Superconducting and Electronic Materials, Faculty of Engineering, Australian Institute for Innovative Materials , University of Wollongong , Wollongong , NSW 2500 , Australia
| | - Shengnan Zhang
- Superconducting Materials Research Center , Northwest Institute for Nonferrous Metal Research , Xi'an 710016 , China
| | - Meng Li
- Institute for Superconducting and Electronic Materials, Faculty of Engineering, Australian Institute for Innovative Materials , University of Wollongong , Wollongong , NSW 2500 , Australia
| | - Lina Sang
- Institute for Superconducting and Electronic Materials, Faculty of Engineering, Australian Institute for Innovative Materials , University of Wollongong , Wollongong , NSW 2500 , Australia
| | - Zhi Li
- Institute for Superconducting and Electronic Materials, Faculty of Engineering, Australian Institute for Innovative Materials , University of Wollongong , Wollongong , NSW 2500 , Australia
| | - Zhenxiang Cheng
- Institute for Superconducting and Electronic Materials, Faculty of Engineering, Australian Institute for Innovative Materials , University of Wollongong , Wollongong , NSW 2500 , Australia
| | - Weiyao Zhao
- Institute for Superconducting and Electronic Materials, Faculty of Engineering, Australian Institute for Innovative Materials , University of Wollongong , Wollongong , NSW 2500 , Australia
| | - Jianqing Feng
- Superconducting Materials Research Center , Northwest Institute for Nonferrous Metal Research , Xi'an 710016 , China
| | - Chengshan Li
- School of Materials Science and Engineering , Northeastern University , Shenyang 110819 , China
- Superconducting Materials Research Center , Northwest Institute for Nonferrous Metal Research , Xi'an 710016 , China
| | - Pingxiang Zhang
- School of Materials Science and Engineering , Northeastern University , Shenyang 110819 , China
- Superconducting Materials Research Center , Northwest Institute for Nonferrous Metal Research , Xi'an 710016 , China
| | - Shixue Dou
- Institute for Superconducting and Electronic Materials, Faculty of Engineering, Australian Institute for Innovative Materials , University of Wollongong , Wollongong , NSW 2500 , Australia
| | - Xiaolin Wang
- Institute for Superconducting and Electronic Materials, Faculty of Engineering, Australian Institute for Innovative Materials , University of Wollongong , Wollongong , NSW 2500 , Australia
| | - Lian Zhou
- School of Materials Science and Engineering , Northeastern University , Shenyang 110819 , China
- Superconducting Materials Research Center , Northwest Institute for Nonferrous Metal Research , Xi'an 710016 , China
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Sun F, Guo Z, Liu N, Lin K, Wang D, Yuan W. KFeCuTe 2: a new compound to study the removal of interstitial Fe in layered tellurides. Dalton Trans 2017; 46:3649-3654. [PMID: 28252140 DOI: 10.1039/c7dt00219j] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A single crystal of a new layered telluride KFeCuTe2 has been successfully synthesized by the self-flux method, which is formed by intercalating K in the parent telluride Fe1+xCuTe2. This new compound crystallizes in the space group I4/mmm with the interstitial Fe in pristine Fe1+xCuTe2 completely removed after K intercalation. X-ray photoelectron spectroscopy (XPS) shows that after intercalation, the valence of Fe switched from a mixture of +2 and +3 to the single trivalent one. The KFeCuTe2 is a Mott semiconductor (Eg = 1.06 eV) with a larger resistivity than that of Fe1+xCuTe2 due to the absence of electron doping from interstitial Fe atoms. Most importantly, the magnetic susceptibility shows the antiferromagnetic transition in KFeCuTe2 at 60 K, instead of the spin-glass behavior in Fe1+xCuTe2, indicating the crucial role of interstitial Fe in breaking the long-range magnetic ordering. Our work provides a new compound to study the effect of interstitial Fe on the crystal and magnetic structure in layered tellurides.
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Affiliation(s)
- Fan Sun
- Department of Chemistry, School of Chemistry and Biological Engineering, University of Science and Technology Beijing, Beijing 100083, China.
| | - Zhongnan Guo
- Department of Chemistry, School of Chemistry and Biological Engineering, University of Science and Technology Beijing, Beijing 100083, China.
| | - Ning Liu
- Research & Development Center for Functional Crystals, Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China
| | - Kun Lin
- Department of Physical Chemistry, State Key Laboratory for Advanced Metals and Materials, University of Science and Technology Beijing, Beijing 100083, China
| | - Da Wang
- Research & Development Center for Functional Crystals, Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China
| | - Wenxia Yuan
- Department of Chemistry, School of Chemistry and Biological Engineering, University of Science and Technology Beijing, Beijing 100083, China.
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