1
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Pinto V, Vannozzi A, Celentano G, Tomellini M, Meledin A, Orlanducci S. Nanodiamond Influence on the Nucleation and Growth of YBCO Superconducting Film Deposited by Metal-Organic Decomposition. CRYSTAL GROWTH & DESIGN 2023; 23:6086-6099. [PMID: 37547874 PMCID: PMC10401629 DOI: 10.1021/acs.cgd.3c00607] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 05/18/2023] [Revised: 06/25/2023] [Indexed: 08/08/2023]
Abstract
It was recently shown that the introduction of nanodiamond (ND) into a superconducting metal-organic deposited YBa2Cu3O7-δ (YBCO) film produces an increase in critical current density in self-field conditions (B = 0 T). Such improvement appears to be due to the formation of denser and smoother films than the samples deposited without ND. This paper presents the work done to understand the role of ND during YBCO nucleation and growth. A detailed study on YBCO+ND films quenched at different temperatures of the crystallization process was carried out. Results showed that the reaction responsible for YBCO production appeared effectively affected by ND. In particular, ND stabilizes one of the YBCO precursors, BaF2(1-x)Ox, whose conversion into YBCO requires a prolonged time. Therefore, the YBCO nucleation is slowed down by ND and begins when the experimental conditions favor both thermodynamically and kinetically the formation of YBCO along the c-axis. This effect has important implications because the growth of a highly epitaxial c-axis YBCO film enables excellent superconducting performance.
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Affiliation(s)
- Valentina Pinto
- Superconductivity
Laboratory, FSN-COND, ENEA, Via E. Fermi 45, 00044 Frascati (Rome), Italy
| | - Angelo Vannozzi
- Superconductivity
Laboratory, FSN-COND, ENEA, Via E. Fermi 45, 00044 Frascati (Rome), Italy
| | - Giuseppe Celentano
- Superconductivity
Laboratory, FSN-COND, ENEA, Via E. Fermi 45, 00044 Frascati (Rome), Italy
| | - Massimo Tomellini
- Department
of Chemical Sciences and Technologies, Via della Ricerca Scientifica, Tor Vergata University, Rome 000173, Italy
| | - Alexander Meledin
- Central
Facility for Electron Microscopy, RWTH Aachen
University, Ahornstraße 55, 52074 Aachen, Germany
| | - Silvia Orlanducci
- Department
of Chemical Sciences and Technologies, Via della Ricerca Scientifica, Tor Vergata University, Rome 000173, Italy
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2
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Gao Y, Roldan MA, Qiao L, Mandrus D, Shen X, Chisholm MF, Singh DJ, Cao G. Vertical nanoscale strain-induced electronic localization in epitaxial La 2/3Sr 1/3MnO 3 films with ZrO 2 nanopillar inclusions. NANO CONVERGENCE 2023; 10:35. [PMID: 37505327 PMCID: PMC10382461 DOI: 10.1186/s40580-023-00382-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Subscribe] [Scholar Register] [Received: 03/27/2023] [Accepted: 07/05/2023] [Indexed: 07/29/2023]
Abstract
Unusual electrical transport properties associated with weak or strong localization are sometimes found in disordered electronic materials. Here, we report experimental observation of a crossover of electronic behavior from weak localization to enhanced weak localization due to the spatial influence of disorder induced by ZrO2 nanopillars in (La2/3Sr1/3MnO3)1-x:(ZrO2)x (x = 0, 0.2, and 0.3) nanocomposite films. The spatial strain regions, identified by scanning transmission electron microscopy and high-resolution x-ray diffraction, induce a coexistence of two-dimentional (2D) and three-dimentional (3D) localization and switches to typical 2D localization with increasing density of ZrO2 pillars due to length scale confinement, which interestingly accords with enhancing vertically interfacial strain. Based on the excellent agreement of our experimental results with one-parameter scaling theory of localization, the enhanced weak localization exists in metal range close to the fixed point. These films provide a tunable experimental model for studying localization in particular the transition regime by appropriate choice of the second epitaxial phase.
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Affiliation(s)
- Yuze Gao
- Materials Genome Institute, Shanghai University, Shanghai, 200444, China
| | - Manuel A Roldan
- Materials Science and Technology Division, Oak Ridge National Laboratory, Oak Ridge, TN, 37831-6056, USA
- Departamento Fisica Aplicada III, Facultad de Ciencias Fisicas, Universidad Complutense de Madrid, 28040, Madrid, Spain
| | - Liang Qiao
- Center for Nanophase Materials Sciences, Oak Ridge National Laboratory, Oak Ridge, TN, 37831, USA
| | - David Mandrus
- Materials Science and Technology Division, Oak Ridge National Laboratory, Oak Ridge, TN, 37831-6056, USA
| | - Xuechu Shen
- National Laboratory for Infrared Physics, Shanghai Institute of Technical Physics, Chinese Academy of Sciences, Shanghai, 200083, China
| | - Matthew F Chisholm
- Materials Science and Technology Division, Oak Ridge National Laboratory, Oak Ridge, TN, 37831-6056, USA
| | - David J Singh
- Department of Physics and Astronomy, University of Missouri, Columbia, MO, 65211-7010, USA
| | - Guixin Cao
- Materials Genome Institute, Shanghai University, Shanghai, 200444, China.
- Zhejiang Laboratory, Hangzhou, 311100, China.
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3
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Zhang J, Wu H, Zhao G, Han L, Zhang J. Progress in the Study of Vortex Pinning Centers in High-Temperature Superconducting Films. NANOMATERIALS (BASEL, SWITZERLAND) 2022; 12:nano12224000. [PMID: 36432287 PMCID: PMC9696172 DOI: 10.3390/nano12224000] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/04/2022] [Revised: 11/08/2022] [Accepted: 11/10/2022] [Indexed: 06/13/2023]
Abstract
Since the discovery of high-temperature superconductors (HTSs), significant progress in the fabrication of HTS films has been achieved. In this review, we intend to provide an overview of recent progress in how and why superconductivity can be enhanced by introducing nanoscale vortex pinning centers. The comprehensive control of morphology, dimension, orientation and concentration of artificial pinning centers (APCs) and the principle of vortex pinning are the focus of this review. According to the existing literature, HTSs with the best superconductivity can be obtained when one-dimensional (1D) and three-dimensional (3D) nanoscale APCs are combined for vortex pinning.
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Affiliation(s)
- Jian Zhang
- Key Laboratory for Water Quality and Conservation of the Pearl River Delta, Institute of Environmental Research at Greater Bay Area, Guangzhou University, Ministry of Education, Guangzhou 510006, China
- Key Laboratory of Spin Electron and Nanomaterials of Anhui Higher Education Institutes, Suzhou University, Suzhou 234000, China
| | - Haiyan Wu
- Key Laboratory for Water Quality and Conservation of the Pearl River Delta, Institute of Environmental Research at Greater Bay Area, Guangzhou University, Ministry of Education, Guangzhou 510006, China
- Key Laboratory of Spin Electron and Nanomaterials of Anhui Higher Education Institutes, Suzhou University, Suzhou 234000, China
| | - Guangzhen Zhao
- Key Laboratory of Spin Electron and Nanomaterials of Anhui Higher Education Institutes, Suzhou University, Suzhou 234000, China
| | - Lu Han
- Key Laboratory of Spin Electron and Nanomaterials of Anhui Higher Education Institutes, Suzhou University, Suzhou 234000, China
| | - Jun Zhang
- School of Pharmacy, Dali University, Dali 671000, China
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4
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Chen J, Huang R, Zhou D, Li M, Bai C, Liu Z, Cai C. Improvement of epitaxial growth and flux pinning of MOD-derived YBa2Cu3O7−δ nanocomposites films by self-seeding and multi-element doping strategies. Ann Ital Chir 2022. [DOI: 10.1016/j.jeurceramsoc.2022.07.051] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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5
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Ultra-high critical current densities of superconducting YBa 2Cu 3O 7-δ thin films in the overdoped state. Sci Rep 2021; 11:8176. [PMID: 33854183 PMCID: PMC8047038 DOI: 10.1038/s41598-021-87639-4] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2020] [Accepted: 03/24/2021] [Indexed: 02/02/2023] Open
Abstract
The functional properties of cuprates are strongly determined by the doping state and carrier density. We present an oxygen doping study of YBa2Cu3O7-δ (YBCO) thin films from underdoped to overdoped state, correlating the measured charge carrier density, [Formula: see text], the hole doping, p, and the critical current density, [Formula: see text]. Our results show experimental demonstration of strong increase of [Formula: see text] with [Formula: see text], up to Quantum Critical Point (QCP), due to an increase of the superconducting condensation energy. The ultra-high [Formula: see text] achieved, 90 MA cm-2 at 5 K corresponds to about a fifth of the depairing current, i.e. a value among the highest ever reported in YBCO films. The overdoped regime is confirmed by a sudden increase of [Formula: see text], associated to the reconstruction of the Fermi-surface at the QCP. Overdoping YBCO opens a promising route to extend the current carrying capabilities of rare-earth barium copper oxide (REBCO) coated conductors for applications.
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6
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Orús P, Córdoba R, Hlawacek G, De Teresa JM. Superconducting properties of in-plane W-C nanowires grown by He + focused ion beam induced deposition. NANOTECHNOLOGY 2021; 32:085301. [PMID: 33171446 DOI: 10.1088/1361-6528/abc91c] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Focused ion beam induced deposition (FIBID) is a nanopatterning technique that uses a focused beam of charged ions to decompose a gaseous precursor. So far, the flexible patterning capabilities of FIBID have been widely exploited in the fabrication of superconducting nanostructures, using the W(CO)6 precursor mostly in combination with a focused beam of Ga+ ions. Here, the fabrication and characterization of superconducting in-plane tungsten-carbon (W-C) nanostructures by He+ FIBID of the W(CO)6 precursor is reported. A patterning resolution of 10 nm has been achieved, which is virtually unattainable for Ga+ FIBID. When the nanowires are patterned with widths of 20 nm and above, the deposited material is superconducting below 3.5-4 K. In addition, nanowires with widths of 60 and 90 nm have been found to sustain long-range controlled nonlocal superconducting vortex transfer along 3 μm. Overall, these findings strengthen the capabilities of He+ FIBID of W-C in the growth and patterning of in-plane superconducting nanodevices.
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Affiliation(s)
- Pablo Orús
- Instituto de Nanociencia y Materiales de Aragón (INMA), CSIC-Universidad de Zaragoza, 50009 Zaragoza, Spain
- Departamento de Física de la Materia Condensada, Facultad de Ciencias, Universidad de Zaragoza, 50009 Zaragoza, Spain
- Laboratorio de Microscopías Avanzadas (LMA), University of Zaragoza, 50018 Zaragoza, Spain
| | - Rosa Córdoba
- Instituto de Ciencia Molecular, Universitat de València, Paterna, 46980 València, Spain
| | - Gregor Hlawacek
- Institute of Ion Beam Physics and Materials Research, Helmholtz-Zentrum Dresden-Rossendorf, 01328 Dresden, Germany
| | - José María De Teresa
- Instituto de Nanociencia y Materiales de Aragón (INMA), CSIC-Universidad de Zaragoza, 50009 Zaragoza, Spain
- Departamento de Física de la Materia Condensada, Facultad de Ciencias, Universidad de Zaragoza, 50009 Zaragoza, Spain
- Laboratorio de Microscopías Avanzadas (LMA), University of Zaragoza, 50018 Zaragoza, Spain
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7
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Cayado P, Rijckaert H, Bruneel E, Erbe M, Hänisch J, Van Driessche I, Holzapfel B. Importance of the pyrolysis for microstructure and superconducting properties of CSD-grown GdBa 2Cu 3O 7-x-HfO 2 nanocomposite films by the ex-situ approach. Sci Rep 2020; 10:19469. [PMID: 33173091 PMCID: PMC7655947 DOI: 10.1038/s41598-020-75587-4] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2020] [Accepted: 09/17/2020] [Indexed: 11/25/2022] Open
Abstract
For the first time, GdBa2Cu3O7-x nanocomposites were prepared by chemical solution deposition following the ex-situ approach. In particular, ~ 220 nm GdBa2Cu3O7-x-HfO2 (GdBCO-HfO2) nanocomposite films were fabricated starting from a colloidal solution of 5 mol% HfO2 nanoparticles. Hereby, one of the main challenges is to avoid the accumulation of the nanoparticles at the substrate interface during the pyrolysis, which would later prevent the epitaxial nucleation of the GdBCO grains. Therefore, the effect of pyrolysis processing parameters such as heating ramp and temperature on the homogeneity of the nanoparticle distribution has been investigated. By increasing the heating ramp to 300 °C/h and decreasing the final temperature to 300 °C, a more homogenous nanoparticle distribution was achieved. This translates into improved superconducting properties of the grown films reaching critical temperatures (Tc) of 94.5 K and self-field critical current densities ([Formula: see text]) at 77 K of 2.1 MA/cm2 with respect to films pyrolyzed at higher temperatures or lower heating ramps.
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Affiliation(s)
- Pablo Cayado
- Karlsruhe Institute of Technology (KIT), Institute for Technical Physics (ITEP), Hermann-von-Helmholtz-Platz 1, 76344, Eggenstein-Leopoldshafen, Germany.
| | - Hannes Rijckaert
- Department of Chemistry, Ghent University, SCRiPTS, Krijgslaan, 281-S3, 9000, Ghent, Belgium
| | - Els Bruneel
- Department of Chemistry, Ghent University, SCRiPTS, Krijgslaan, 281-S3, 9000, Ghent, Belgium
| | - Manuela Erbe
- Karlsruhe Institute of Technology (KIT), Institute for Technical Physics (ITEP), Hermann-von-Helmholtz-Platz 1, 76344, Eggenstein-Leopoldshafen, Germany
| | - Jens Hänisch
- Karlsruhe Institute of Technology (KIT), Institute for Technical Physics (ITEP), Hermann-von-Helmholtz-Platz 1, 76344, Eggenstein-Leopoldshafen, Germany.
| | - Isabel Van Driessche
- Department of Chemistry, Ghent University, SCRiPTS, Krijgslaan, 281-S3, 9000, Ghent, Belgium
| | - Bernhard Holzapfel
- Karlsruhe Institute of Technology (KIT), Institute for Technical Physics (ITEP), Hermann-von-Helmholtz-Platz 1, 76344, Eggenstein-Leopoldshafen, Germany
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8
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Hope M, Zhang B, Zhu B, Halat DM, MacManus-Driscoll JL, Grey CP. Revealing the Structure and Oxygen Transport at Interfaces in Complex Oxide Heterostructures via 17O NMR Spectroscopy. CHEMISTRY OF MATERIALS : A PUBLICATION OF THE AMERICAN CHEMICAL SOCIETY 2020; 32:7921-7931. [PMID: 32982045 PMCID: PMC7513580 DOI: 10.1021/acs.chemmater.0c02698] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/26/2020] [Revised: 08/18/2020] [Indexed: 05/24/2023]
Abstract
Vertically aligned nanocomposite (VAN) films, comprising nanopillars of one phase embedded in a matrix of another, have shown great promise for a range of applications due to their high interfacial areas oriented perpendicular to the substrate. In particular, oxide VANs show enhanced oxide-ion conductivity in directions that are orthogonal to those found in more conventional thin-film heterostructures; however, the structure of the interfaces and its influence on conductivity remain unclear. In this work, 17O NMR spectroscopy is used to study CeO2-SrTiO3 VAN thin films: selective isotopic enrichment is combined with a lift-off technique to remove the substrate, facilitating detection of the 17O NMR signal from single atomic layer interfaces. By performing the isotopic enrichment at variable temperatures, the superior oxide-ion conductivity of the VAN films compared to the bulk materials is shown to arise from enhanced oxygen mobility at this interface; oxygen motion at the interface is further identified from 17O relaxometry experiments. The structure of this interface is solved by calculating the NMR parameters using density functional theory combined with random structure searching, allowing the chemistry underpinning the enhanced oxide-ion transport to be proposed. Finally, a comparison is made with 1% Gd-doped CeO2-SrTiO3 VAN films, for which greater NMR signal can be obtained due to paramagnetic relaxation enhancement, while the relative oxide-ion conductivities of the phases remain similar. These results highlight the information that can be obtained on interfacial structure and dynamics with solid-state NMR spectroscopy, in this and other nanostructured systems, our methodology being generally applicable to overcome sensitivity limitations in thin-film studies.
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Affiliation(s)
- Michael
A. Hope
- Department
of Chemistry, University of Cambridge, Lensfield Road, Cambridge, CB2 1EW, United
Kingdom
| | - Bowen Zhang
- Department
of Materials Science and Metallurgy, University
of Cambridge, 27 Charles Babbage Road, Cambridge CB3 0FS, United Kingdom
| | - Bonan Zhu
- Department
of Materials Science and Metallurgy, University
of Cambridge, 27 Charles Babbage Road, Cambridge CB3 0FS, United Kingdom
| | - David M. Halat
- Department
of Chemistry, University of Cambridge, Lensfield Road, Cambridge, CB2 1EW, United
Kingdom
| | - Judith L. MacManus-Driscoll
- Department
of Materials Science and Metallurgy, University
of Cambridge, 27 Charles Babbage Road, Cambridge CB3 0FS, United Kingdom
| | - Clare P. Grey
- Department
of Chemistry, University of Cambridge, Lensfield Road, Cambridge, CB2 1EW, United
Kingdom
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9
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Rutherford B, Zhang B, Wang X, Sun X, Qi Z, Wang H, Wang H. Strain Effects on the Growth of La 0.7Sr 0.3MnO 3 (LSMO)-NiO Nanocomposite Thin Films via Substrate Control. ACS OMEGA 2020; 5:23793-23798. [PMID: 32984699 PMCID: PMC7513345 DOI: 10.1021/acsomega.0c02923] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 06/17/2020] [Accepted: 08/24/2020] [Indexed: 06/11/2023]
Abstract
Oxide-oxide-based vertically aligned nanocomposites (VANs) have demonstrated a new material platform for enhanced and/or combined functionalities because of their unique vertical geometry and strain coupling. Various factors contribute to the growth of VANs, including deposition parameters, phase composition, phase ratios, crystallography, etc. In this work, substrate strain effects are explored through growing a two-phase oxide-oxide La0.7Sr0.3MnO3 (LSMO):NiO system, combining antiferromagnetic NiO and ferromagnetic LSMO, on various substrates with different lattice parameters. The X-ray diffraction (XRD), transmission electron microscopy (TEM), and magnetic property measurements all suggest that substrate strain plays a critical role in the epitaxial growth of a VAN structure and their two-phase separation, and thus results in different physical properties. This work sheds light on the fundamental nucleation and growth mechanisms of the two-phase VAN systems and the effects of substrate strain on the overall orientation and growth quality of the VAN films.
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Affiliation(s)
- Bethany
X. Rutherford
- School
of Materials Engineering, Purdue University, West Lafayette, Indiana 47907, United States
| | - Bruce Zhang
- School
of Electrical and Computer Engineering, Purdue University, West Lafayette, Indiana 47907, United States
| | - Xuejing Wang
- School
of Materials Engineering, Purdue University, West Lafayette, Indiana 47907, United States
| | - Xing Sun
- School
of Materials Engineering, Purdue University, West Lafayette, Indiana 47907, United States
| | - Zhimin Qi
- School
of Materials Engineering, Purdue University, West Lafayette, Indiana 47907, United States
| | - Han Wang
- School
of Materials Engineering, Purdue University, West Lafayette, Indiana 47907, United States
| | - Haiyan Wang
- School
of Materials Engineering, Purdue University, West Lafayette, Indiana 47907, United States
- School
of Electrical and Computer Engineering, Purdue University, West Lafayette, Indiana 47907, United States
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10
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Li Z, Coll M, Mundet B, Palau A, Puig T, Obradors X. Suppression of superconductivity at the nanoscale in chemical solution derived YBa 2Cu 3O 7-δ thin films with defective Y 2Ba 4Cu 8O 16 intergrowths. NANOSCALE ADVANCES 2020; 2:3384-3393. [PMID: 36134255 PMCID: PMC9418937 DOI: 10.1039/d0na00456a] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/04/2020] [Accepted: 06/23/2020] [Indexed: 06/13/2023]
Abstract
The analysis of the microstructure and superconducting behavior of chemical solution deposited epitaxial YBa2Cu3O7-δ films, with thickness going down to 5 nm has been carried out with the purpose to disclose the behavior of the most common intergrowth in these films, the Y2Ba4Cu8O16. The analysis of ultrathin films is a unique opportunity to investigate the superconducting behavior of these nanoscale defects because of the high concentration created as a consequence of the elastic energy associated to the misfit strain. Magnetic susceptibility and X-ray diffraction measurements evidence a strong decrease of the superconducting volume correlated with an increase of the intergrowth volume fraction. We demonstrate that these intergrowths are non-superconducting nanoscale regions where Cooper pair formation is disrupted, in agreement with their key role as artificial pinning centers for vortices in YBa2Cu3O7-δ films and coated conductors.
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Affiliation(s)
- Ziliang Li
- Institut de Ciència de Materials de Barcelona, CSIC, Campus de la UAB 08193 Bellaterra Catalonia Spain
| | - Mariona Coll
- Institut de Ciència de Materials de Barcelona, CSIC, Campus de la UAB 08193 Bellaterra Catalonia Spain
| | - Bernat Mundet
- Institut de Ciència de Materials de Barcelona, CSIC, Campus de la UAB 08193 Bellaterra Catalonia Spain
| | - Anna Palau
- Institut de Ciència de Materials de Barcelona, CSIC, Campus de la UAB 08193 Bellaterra Catalonia Spain
| | - Teresa Puig
- Institut de Ciència de Materials de Barcelona, CSIC, Campus de la UAB 08193 Bellaterra Catalonia Spain
| | - Xavier Obradors
- Institut de Ciència de Materials de Barcelona, CSIC, Campus de la UAB 08193 Bellaterra Catalonia Spain
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11
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Romanov A, Krkotić P, Telles G, O'Callaghan J, Pont M, Perez F, Granados X, Calatroni S, Puig T, Gutierrez J. High frequency response of thick REBCO coated conductors in the framework of the FCC study. Sci Rep 2020; 10:12325. [PMID: 32704019 PMCID: PMC7378233 DOI: 10.1038/s41598-020-69004-z] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/03/2020] [Accepted: 06/16/2020] [Indexed: 11/16/2022] Open
Abstract
A thorough microwave response study of high temperature superconductors, considered as an alternative beam screen coating, has become integral in the design decisions for CERN’s future research infrastructure. Here, we present the surface resistance \documentclass[12pt]{minimal}
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\begin{document}$$R_{s}$$\end{document}Rs of various \documentclass[12pt]{minimal}
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\begin{document}$$\text {REBa}_{2}\text {Cu}_{3}\text {O}_{7-x}$$\end{document}REBa2Cu3O7-x (RE = rare earth) coated conductors available in large scale as a function of magnetic field in a broad temperature range measured by a Hakki–Coleman type resonator with resonant frequency \documentclass[12pt]{minimal}
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\begin{document}$$\nu \approx {8}\,{\text {GHz}}$$\end{document}ν≈8GHz. Analysis of the high frequency dissipation supported by DC transport characterization reveals the vortex dynamics in thick \documentclass[12pt]{minimal}
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\begin{document}$$\text {REBa}_{2}\text {Cu}_{3}\text {O}_{7-x}$$\end{document}REBa2Cu3O7-x films. Determined microscopic vortex parameters span over a wide range of magnitudes and reflect the relevance of the superconducting layer’s microstructure. We demonstrate that the depinning frequencies \documentclass[12pt]{minimal}
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\begin{document}$$\nu$$\end{document}ν, which confirms the operation in high performing, low dissipation pinning regime at measurement conditions. Surface impedance extrapolation to FCC-hh conditions points towards a significant outperformance of copper by coated conductors in terms of surface resistance. The surface resistance margins would open up potential ways for a more efficient frontier circular collider.
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Affiliation(s)
- Artur Romanov
- Institut de Ciència de Materials de Barcelona, C.S.I.C., Campus U.A. Barcelona, 08193, Bellaterra, Catalonia, Spain.
| | - Patrick Krkotić
- ALBA Synchrotron-CELLS, Carrer de la Llum 2-26, 08290, Cerdanyola del Vallés, Barcelona, Spain.,Universitat Politècnica de Catalunya, CommSensLab. c/ Jordi Girona 1, 08034, Barcelona, Catalonia, Spain
| | - Guilherme Telles
- Institut de Ciència de Materials de Barcelona, C.S.I.C., Campus U.A. Barcelona, 08193, Bellaterra, Catalonia, Spain
| | - Joan O'Callaghan
- Universitat Politècnica de Catalunya, CommSensLab. c/ Jordi Girona 1, 08034, Barcelona, Catalonia, Spain
| | - Montse Pont
- ALBA Synchrotron-CELLS, Carrer de la Llum 2-26, 08290, Cerdanyola del Vallés, Barcelona, Spain
| | - Francis Perez
- ALBA Synchrotron-CELLS, Carrer de la Llum 2-26, 08290, Cerdanyola del Vallés, Barcelona, Spain
| | - Xavier Granados
- Institut de Ciència de Materials de Barcelona, C.S.I.C., Campus U.A. Barcelona, 08193, Bellaterra, Catalonia, Spain
| | - Sergio Calatroni
- European Organization for Nuclear Research (CERN), 1211, Geneva 23, Switzerland
| | - Teresa Puig
- Institut de Ciència de Materials de Barcelona, C.S.I.C., Campus U.A. Barcelona, 08193, Bellaterra, Catalonia, Spain.
| | - Joffre Gutierrez
- Institut de Ciència de Materials de Barcelona, C.S.I.C., Campus U.A. Barcelona, 08193, Bellaterra, Catalonia, Spain
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12
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Antončík F, Jankovský O, Hlásek T, Bartůněk V. Nanosized Pinning Centers in the Rare Earth-Barium-Copper-Oxide Thin-Film Superconductors. NANOMATERIALS 2020; 10:nano10081429. [PMID: 32707997 PMCID: PMC7466701 DOI: 10.3390/nano10081429] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/26/2020] [Revised: 07/17/2020] [Accepted: 07/20/2020] [Indexed: 11/16/2022]
Abstract
Since the discovery of high-temperature superconductivity, significant progress in the fabrication of REBCO-based (Rare Earth Barium Copper mixed Oxides) thin-films superconductors has been achieved. In our review, we described the approaches and possibilities of the improvement of superconducting properties by the introduction of nanosized pinning centers. We focused on the synthesis and viability of the material for artificial pinning centers and methods used for the introduction of the pinning centers into superconducting REBCO-based thin-films. This article summarizes available materials and procedures regardless of the financial cost of the individual method. According to available literature, the most significant superconducting REBCO tapes can be obtained when a combination of 1D and 0D nanoparticles are used for nanoscale pinning.
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Affiliation(s)
- Filip Antončík
- Department of Inorganic Chemistry, University of Chemistry and Technology, Technická 5, 166 28 Prague 6, Czech Republic; (F.A.); (O.J.); (T.H.)
| | - Ondřej Jankovský
- Department of Inorganic Chemistry, University of Chemistry and Technology, Technická 5, 166 28 Prague 6, Czech Republic; (F.A.); (O.J.); (T.H.)
| | - Tomáš Hlásek
- Department of Inorganic Chemistry, University of Chemistry and Technology, Technická 5, 166 28 Prague 6, Czech Republic; (F.A.); (O.J.); (T.H.)
- CAN SUPERCONDUCTORS s.r.o., Ringhofferova 66, 251 68 Kamenice, Czech Republic
| | - Vilém Bartůněk
- Department of Inorganic Chemistry, University of Chemistry and Technology, Technická 5, 166 28 Prague 6, Czech Republic; (F.A.); (O.J.); (T.H.)
- Correspondence:
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13
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Dong Z, Ding F, Zhang H, Shang H, Huang D, Xu W, Li T, Zou Q, Gu H. Preparation of high performance YGdBCO films by low fluorine TFA-MOD process. J RARE EARTH 2020. [DOI: 10.1016/j.jre.2019.11.002] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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14
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Mundet B, Hartman ST, Guzman R, Idrobo JC, Obradors X, Puig T, Mishra R, Gázquez J. Local strain-driven migration of oxygen vacancies to apical sites in YBa 2Cu 3O 7-x. NANOSCALE 2020; 12:5922-5931. [PMID: 32108218 DOI: 10.1039/d0nr00666a] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
It is well known that in the high-temperature superconductor YBa2Cu3O7-x (YBCO), oxygen vacancies (VO) control the carrier concentration, its critical current density and transition temperature. In this work, it is revealed that VO also allows the accommodation of local strain fields caused by large-scale defects within the crystal. We show that the nanoscale strain associated with Y2Ba4Cu8O16 (Y124) intergrowths-that are common defects in YBCO-strongly affect the venue and concentration of VO. Local probe measurements in conjunction with density-functional-theory calculations indicate a strain-driven reordering of VO from the commonly observed CuO chains towards the bridging apical sites located in the BaO plane and bind directly to the superconducting CuO2 planes. Our findings have strong implications on the physical properties of the YBCO, as the presence of apical VO alters the transfer of carriers to the CuO2 planes, confirmed by changes in the Cu and O core-loss edge probed using electron energy loss spectroscopy, and creates structural changes that affect the Cu-O bonds in the superconducting planes. In addition, the revelation of apical VO also has implications on modulating critical current densities and enhancing vortex pinning.
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Affiliation(s)
- Bernat Mundet
- Institut de Ciència de Materials de Barcelona (ICMAB-CSIC), Campus UAB, Bellaterra, 08193 Barcelona, Spain.
| | - Steven T Hartman
- Institute of Materials Science and Engineering, Washington University in St Louis, St Louis, Missouri 63130, USA
| | - Roger Guzman
- Institut de Ciència de Materials de Barcelona (ICMAB-CSIC), Campus UAB, Bellaterra, 08193 Barcelona, Spain.
| | - Juan C Idrobo
- Center for Nanophase Materials Sciences, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA
| | - Xavier Obradors
- Institut de Ciència de Materials de Barcelona (ICMAB-CSIC), Campus UAB, Bellaterra, 08193 Barcelona, Spain.
| | - Teresa Puig
- Institut de Ciència de Materials de Barcelona (ICMAB-CSIC), Campus UAB, Bellaterra, 08193 Barcelona, Spain.
| | - Rohan Mishra
- Department of Mechanical Engineering and Materials Science, Washington University in St Louis, St Louis, Missouri 63130, USA.
| | - Jaume Gázquez
- Institut de Ciència de Materials de Barcelona (ICMAB-CSIC), Campus UAB, Bellaterra, 08193 Barcelona, Spain.
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15
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Rivasto E, Khan MZ, Malmivirta M, Rijckaert H, Aye MM, Hynninen T, Huhtinen H, Driessche IV, Paturi P. Self-assembled nanorods in YBCO matrix - a computational study of their effects on critical current anisotropy. Sci Rep 2020; 10:3169. [PMID: 32081988 PMCID: PMC7035360 DOI: 10.1038/s41598-020-59879-3] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/04/2019] [Accepted: 12/06/2019] [Indexed: 12/03/2022] Open
Abstract
In order to understand how the doping with self-assembled nanorods of different sizes and concentrations as well as applied magnetic fields affect the critical current anisotropy in YBa2Cu3O7−x (YBCO) thin films close to YBCO c-axis, we present an extensive and systematic computational study done by molecular dynamics simulation. The simulations are also used to understand experimentally measured Jc(θ) curves for BaHfO3, BaZrO3 and BaSnO3 doped YBCO thin films with the help of nanorod parameters obtained from transmission electron microscopy measurements. Our simulations reveal that the relation between applied and matching field plays a crucial role in the formation of Jc(θ)-peak around YBCO c-axis (c-peak) due to vortex-vortex interactions. We also find how different concentrations of different size nanorods effect the shape of the c-peak and explain how different features, such as double c-peak structures, arise. In addition to this, we have quantitatively explained that, even in an ideal superconductor, the overdoping of nanorods results in decrease of the critical current. Our results can be widely used to understand and predict the critical current anisotropy of YBCO thin films to improve and develop new pinscapes for various transport applications.
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Affiliation(s)
- Elmeri Rivasto
- Wihuri Physical Laboratory, Department of Physics and Astronomy, University of Turku, FI-20014, Turku, Finland. .,University of Turku Graduate School (UTUGS), University of Turku, FI-20014, Turku, Finland.
| | - Mukarram Zaman Khan
- Wihuri Physical Laboratory, Department of Physics and Astronomy, University of Turku, FI-20014, Turku, Finland.,University of Turku Graduate School (UTUGS), University of Turku, FI-20014, Turku, Finland
| | - Mika Malmivirta
- Wihuri Physical Laboratory, Department of Physics and Astronomy, University of Turku, FI-20014, Turku, Finland
| | - Hannes Rijckaert
- SCRiPTS, Department of Chemistry, Ghent University, Krijgslaan 281 S3, 9000, Ghent, Belgium
| | - Moe Moe Aye
- Wihuri Physical Laboratory, Department of Physics and Astronomy, University of Turku, FI-20014, Turku, Finland
| | - Teemu Hynninen
- Wihuri Physical Laboratory, Department of Physics and Astronomy, University of Turku, FI-20014, Turku, Finland
| | - Hannu Huhtinen
- Wihuri Physical Laboratory, Department of Physics and Astronomy, University of Turku, FI-20014, Turku, Finland
| | - Isabel Van Driessche
- SCRiPTS, Department of Chemistry, Ghent University, Krijgslaan 281 S3, 9000, Ghent, Belgium
| | - Petriina Paturi
- Wihuri Physical Laboratory, Department of Physics and Astronomy, University of Turku, FI-20014, Turku, Finland
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16
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Soler L, Jareño J, Banchewski J, Rasi S, Chamorro N, Guzman R, Yáñez R, Mocuta C, Ricart S, Farjas J, Roura-Grabulosa P, Obradors X, Puig T. Ultrafast transient liquid assisted growth of high current density superconducting films. Nat Commun 2020; 11:344. [PMID: 31953396 PMCID: PMC6969047 DOI: 10.1038/s41467-019-13791-1] [Citation(s) in RCA: 24] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2019] [Accepted: 11/29/2019] [Indexed: 11/10/2022] Open
Abstract
The achievement of high growth rates in YBa2Cu3O7 epitaxial high-temperature superconducting films has become strategic to enable high-throughput manufacturing of long length coated conductors for energy and large magnet applications. We report on a transient liquid assisted growth process capable of achieving ultrafast growth rates (100 nm s−1) and high critical current densities (5 MA cm−2 at 77 K). This is based on the kinetic preference of Ba-Cu-O to form transient liquids prior to crystalline thermodynamic equilibrium phases, and as such is a non-equilibrium approach. The transient liquid-assisted growth process is combined with chemical solution deposition, proposing a scalable method for superconducting tapes manufacturing. Additionally, using colloidal solutions, the growth process is extended towards fabrication of nanocomposite films for enhanced superconducting properties at high magnetic fields. Fast acquisition in situ synchrotron X-ray diffraction and high resolution scanning transmission electron microscopy (STEM) become crucial measurements in disentangling key aspects of the growth process. High throughput manufacturing of long length coated conductors requires fast epitaxial growth of high-temperature superconducting films. Here, Soler et al. report an ultrafast growth rates and high critical current densities of YBa2Cu3O7 films using a transient liquid-assisted growth method.
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Affiliation(s)
- L Soler
- Institut de Ciència de Materials de Barcelona, ICMAB-CSIC, Campus UAB, 08193, Bellaterra, Catalonia, Spain
| | - J Jareño
- Institut de Ciència de Materials de Barcelona, ICMAB-CSIC, Campus UAB, 08193, Bellaterra, Catalonia, Spain
| | - J Banchewski
- Institut de Ciència de Materials de Barcelona, ICMAB-CSIC, Campus UAB, 08193, Bellaterra, Catalonia, Spain
| | - S Rasi
- Institut de Ciència de Materials de Barcelona, ICMAB-CSIC, Campus UAB, 08193, Bellaterra, Catalonia, Spain.,GRMT, Department of Physics, Universitat de Girona, Campus Montilivi, Edif. PII, E17003, Girona, Catalonia, Spain
| | - N Chamorro
- Institut de Ciència de Materials de Barcelona, ICMAB-CSIC, Campus UAB, 08193, Bellaterra, Catalonia, Spain.,Departament de Química, Universitat Autònoma de Barcelona, 08193, Bellaterra, Catalonia, Spain
| | - R Guzman
- Institut de Ciència de Materials de Barcelona, ICMAB-CSIC, Campus UAB, 08193, Bellaterra, Catalonia, Spain
| | - R Yáñez
- Departament de Química, Universitat Autònoma de Barcelona, 08193, Bellaterra, Catalonia, Spain
| | - C Mocuta
- Synchrotron SOLEIL, L'Orme des Merisiers Saint-Aubin BP 48, 91192, Gif-sur-Yvette, France
| | - S Ricart
- Institut de Ciència de Materials de Barcelona, ICMAB-CSIC, Campus UAB, 08193, Bellaterra, Catalonia, Spain
| | - J Farjas
- GRMT, Department of Physics, Universitat de Girona, Campus Montilivi, Edif. PII, E17003, Girona, Catalonia, Spain
| | - P Roura-Grabulosa
- GRMT, Department of Physics, Universitat de Girona, Campus Montilivi, Edif. PII, E17003, Girona, Catalonia, Spain
| | - X Obradors
- Institut de Ciència de Materials de Barcelona, ICMAB-CSIC, Campus UAB, 08193, Bellaterra, Catalonia, Spain
| | - T Puig
- Institut de Ciència de Materials de Barcelona, ICMAB-CSIC, Campus UAB, 08193, Bellaterra, Catalonia, Spain.
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17
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Rapid Pyrolysis of SmBa2Cu3O7-δ Films in CSD-MOD Using Extremely-Low-Fluorine Solutions. COATINGS 2020. [DOI: 10.3390/coatings10010031] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
SmBa2Cu3O7-δ (SmBCO) films have been prepared by chemical solution deposition starting from extremely-low-fluorine solutions (7% fluorine with respect to standard full trifluoroacetate solutions). Smooth and homogeneous SmBCO films could be achieved at heating rates of up to 20 °C/min during pyrolysis. The best films were achieved at a crystallization temperature of 810 °C and 50 ppm of oxygen partial pressure. At these conditions, the ~270 nm thick SmBCO films grow mostly c-axis-oriented with J c sf values at 77 K of ~2 MA/cm2 and critical temperatures Tc of up to 95.0 K. These results demonstrate that using extremely-low-fluorine solutions is very attractive since the production rate can be largely increased due to the solutions’ robustness during pyrolysis retaining a remarkable quality of the grown films. Nevertheless, further optimization of the growth process is needed to improve the superconducting properties of the films.
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18
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Superconducting HfO2-YBa2Cu3O7−δ Nanocomposite Films Deposited Using Ink-Jet Printing of Colloidal Solutions. COATINGS 2019. [DOI: 10.3390/coatings10010017] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
To reduce the fabrication costs while maximizing the superconducting and pinning properties of YBa2Cu3O7−δ (YBCO) nanocomposite films, the drop-on-demand ink-jet printing technique was used to deposit colloidal YBCO inks onto LaAlO3 substrates. These inks containing preformed HfO2 nanocrystals were carefully adjusted, prior to the jettability, as the droplet formation depends on the rheological properties of the inks themselves. After carefully adjusting printing parameters, 450-nm thick pristine YBCO films with a self-field critical current density (Jc) of 2.7 MA cm−² at 77 K and 500-nm thick HfO2-YBCO nanocomposite films with a self-field Jc of 3.1 MA·cm−² at 77 K were achieved. The final HfO2-YBCO nanocomposite films contained dispersed BaHfO3 particles in a YBCO matrix due to the Ba2+ reactivity with the HfO2 nanocrystals. These nanocomposite films presented a more gradual decrease of Jc with the increased magnetic field. These nanocomposite films also showed higher pinning force densities than the pristine films. This pinning enhancement was related to the favorable size and distribution of the BaHfO3 particles in the YBCO matrix.
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19
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Cayado P, Rijckaert H, Erbe M, Langer M, Jung A, Hänisch J, Holzapfel B. CSD-Grown Y 1-xGd xBa 2Cu 3O 7-δ-BaHfO 3 Nanocomposite Films on Ni5W and IBAD Technical Substrates. NANOMATERIALS (BASEL, SWITZERLAND) 2019; 10:E21. [PMID: 31861729 PMCID: PMC7023279 DOI: 10.3390/nano10010021] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/12/2019] [Revised: 12/13/2019] [Accepted: 12/16/2019] [Indexed: 12/02/2022]
Abstract
Chemical solution deposition (CSD) was used to grow Y1-xGdxBa2Cu3O7-δ-BaHfO3 (YGBCO-BHO) nanocomposite films containing 12 mol% BHO nanoparticles and various amounts of Gd, x, on two kinds of buffered metallic tapes: Ni5W and IBAD. The influence of the rare-earth stoichiometry on structure, morphology and superconducting properties of these films was studied. The growth process was carefully studied in order to find the most appropriate growth conditions for each composition and substrate. This led to a clear improvement in film quality, probably due to the reduction of BaCeO3 formation. In general, the superconducting properties of the films on Ni5W are significantly better. For x > 0.5, epitaxial ~270 nm thick YGBCO-BHO films with Tc > 93 K and self-field Jc at 77 K ~2 MA/cm² were obtained on Ni5W. These results highlight the potential of this approach for the fabrication of high-quality coated conductors.
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Affiliation(s)
- Pablo Cayado
- Karlsruhe Institute of Technology (KIT), Institute for Technical Physics (ITEP), Hermann-von-Helmholtz-Platz 1, 76344 Eggenstein-Leopoldshafen, Germany; (M.E.); (M.L.); (A.J.); (J.H.); (B.H.)
| | - Hannes Rijckaert
- Department of Chemistry, Sol-gel Centre for Research on Inorganic Powders and Thin Films Synthesis (SCRiPTS), Ghent University, Krijgslaan 281-S3, 9000 Ghent, Belgium;
| | - Manuela Erbe
- Karlsruhe Institute of Technology (KIT), Institute for Technical Physics (ITEP), Hermann-von-Helmholtz-Platz 1, 76344 Eggenstein-Leopoldshafen, Germany; (M.E.); (M.L.); (A.J.); (J.H.); (B.H.)
| | - Marco Langer
- Karlsruhe Institute of Technology (KIT), Institute for Technical Physics (ITEP), Hermann-von-Helmholtz-Platz 1, 76344 Eggenstein-Leopoldshafen, Germany; (M.E.); (M.L.); (A.J.); (J.H.); (B.H.)
| | - Alexandra Jung
- Karlsruhe Institute of Technology (KIT), Institute for Technical Physics (ITEP), Hermann-von-Helmholtz-Platz 1, 76344 Eggenstein-Leopoldshafen, Germany; (M.E.); (M.L.); (A.J.); (J.H.); (B.H.)
| | - Jens Hänisch
- Karlsruhe Institute of Technology (KIT), Institute for Technical Physics (ITEP), Hermann-von-Helmholtz-Platz 1, 76344 Eggenstein-Leopoldshafen, Germany; (M.E.); (M.L.); (A.J.); (J.H.); (B.H.)
| | - Bernhard Holzapfel
- Karlsruhe Institute of Technology (KIT), Institute for Technical Physics (ITEP), Hermann-von-Helmholtz-Platz 1, 76344 Eggenstein-Leopoldshafen, Germany; (M.E.); (M.L.); (A.J.); (J.H.); (B.H.)
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20
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Córdoba R, Mailly D, Rezaev RO, Smirnova EI, Schmidt OG, Fomin VM, Zeitler U, Guillamón I, Suderow H, De Teresa JM. Three-Dimensional Superconducting Nanohelices Grown by He +-Focused-Ion-Beam Direct Writing. NANO LETTERS 2019; 19:8597-8604. [PMID: 31730351 PMCID: PMC7005939 DOI: 10.1021/acs.nanolett.9b03153] [Citation(s) in RCA: 27] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/01/2019] [Revised: 11/12/2019] [Indexed: 06/01/2023]
Abstract
Novel schemes based on the design of complex three-dimensional (3D) nanoscale architectures are required for the development of the next generation of advanced electronic components. He+ focused-ion-beam (FIB) microscopy in combination with a precursor gas allows one to fabricate 3D nanostructures with an extreme resolution and a considerably higher aspect ratio than FIB-based methods, such as Ga+ FIB-induced deposition, or other additive manufacturing technologies. In this work, we report the fabrication of 3D tungsten carbide nanohelices with on-demand geometries via controlling key deposition parameters. Our results show the smallest and highest-densely packed nanohelix ever fabricated so far, with dimensions of 100 nm in diameter and aspect ratio up to 65. These nanohelices become superconducting at 7 K and show a large critical magnetic field and critical current density. In addition, given its helical 3D geometry, fingerprints of vortex and phase-slip patterns are experimentally identified and supported by numerical simulations based on the time-dependent Ginzburg-Landau equation. These results can be understood by the helical geometry that induces specific superconducting properties and paves the way for future electronic components, such as sensors, energy storage elements, and nanoantennas, based on 3D compact nanosuperconductors.
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Affiliation(s)
- Rosa Córdoba
- Instituto
de Ciencia de Materiales de Aragón (ICMA), Universidad de Zaragoza-CSIC, E-50009 Zaragoza, Spain
- Departamento
de Física de la Materia Condensada, Universidad de Zaragoza, E-50009 Zaragoza, Spain
- Instituto
de Ciencia Molecular, Universitat de València, Catedrático José Beltrán
2, 46980 Paterna, Spain
| | - Dominique Mailly
- Centre
de Nanosciences et de Nanotechnologies, CNRS, Université Paris Sud, Université Paris Saclay, 91120 Palaiseau, France
| | - Roman O. Rezaev
- Institute
for Integrative Nanosciences, Leibniz IFW Dresden, Helmholtzstraße 20, D-01069 Dresden, Germany
- Tomsk Polytechnic
University, Lenin Ave.
30, 634050 Tomsk, Russia
| | - Ekaterina I. Smirnova
- Institute
for Integrative Nanosciences, Leibniz IFW Dresden, Helmholtzstraße 20, D-01069 Dresden, Germany
| | - Oliver G. Schmidt
- Institute
for Integrative Nanosciences, Leibniz IFW Dresden, Helmholtzstraße 20, D-01069 Dresden, Germany
- Research
Center for Materials, Architectures, and Integration of Nanomembranes
(MAIN), TU Chemnitz, Rosenbergstraße 6, D-09126 Chemnitz, Germany
| | - Vladimir M. Fomin
- Institute
for Integrative Nanosciences, Leibniz IFW Dresden, Helmholtzstraße 20, D-01069 Dresden, Germany
- National
Research Nuclear University MEPhI (Moscow Engineering Physics Institute), Kashirskoe shosse 31, 115409 Moscow, Russia
| | - Uli Zeitler
- High
Field Magnet Laboratory (HFML-EFML), Radboud
University, 6525 ED Nijmegen, The Netherlands
| | - Isabel Guillamón
- Laboratorio
de Bajas Temperaturas y Altos Campos Magnéticos, Departamento
de Física de la Materia Condensada, Instituto de Ciencia de
Materiales Nicolás Cabrera, Condensed Matter Physics Center
(IFIMAC), Universidad Autónoma de
Madrid, 28049 Madrid, Spain
| | - Hermann Suderow
- Laboratorio
de Bajas Temperaturas y Altos Campos Magnéticos, Departamento
de Física de la Materia Condensada, Instituto de Ciencia de
Materiales Nicolás Cabrera, Condensed Matter Physics Center
(IFIMAC), Universidad Autónoma de
Madrid, 28049 Madrid, Spain
| | - José María De Teresa
- Instituto
de Ciencia de Materiales de Aragón (ICMA), Universidad de Zaragoza-CSIC, E-50009 Zaragoza, Spain
- Departamento
de Física de la Materia Condensada, Universidad de Zaragoza, E-50009 Zaragoza, Spain
- Laboratorio
de Microscopías Avanzadas (LMA), Instituto de Nanociencia de
Aragón (INA), Universidad de Zaragoza, E-50018 Zaragoza, Spain
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21
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Córdoba R, Orús P, Jelić ŽL, Sesé J, Ibarra MR, Guillamón I, Vieira S, Palacios JJ, Suderow H, Milosević MV, De Teresa JM. Long-range vortex transfer in superconducting nanowires. Sci Rep 2019; 9:12386. [PMID: 31455848 PMCID: PMC6712003 DOI: 10.1038/s41598-019-48887-7] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2019] [Accepted: 08/01/2019] [Indexed: 11/24/2022] Open
Abstract
Under high-enough values of perpendicularly-applied magnetic field and current, a type-II superconductor presents a finite resistance caused by the vortex motion driven by the Lorentz force. To recover the dissipation-free conduction state, strategies for minimizing vortex motion have been intensely studied in the last decades. However, the non-local vortex motion, arising in areas depleted of current, has been scarcely investigated despite its potential application for logic devices. Here, we propose a route to transfer vortices carried by non-local motion through long distances (up to 10 micrometers) in 50 nm-wide superconducting WC nanowires grown by Ga+ Focused Ion Beam Induced Deposition. A giant non-local electrical resistance of 36 Ω has been measured at 2 K in 3 μm-long nanowires, which is 40 times higher than signals reported for wider wires of other superconductors. This giant effect is accounted for by the existence of a strong edge confinement potential that hampers transversal vortex displacements, allowing the long-range coherent displacement of a single vortex row along the superconducting channel. Experimental results are in good agreement with numerical simulations of vortex dynamics based on the time-dependent Ginzburg-Landau equations. Our results pave the way for future developments on information technologies built upon single vortex manipulation in nano-superconductors.
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Affiliation(s)
- Rosa Córdoba
- Instituto de Ciencia de Materiales de Aragón (ICMA), Universidad de Zaragoza-CSIC, E-50009, Zaragoza, Spain. .,Departamento de Física de la Materia Condensada, Universidad de Zaragoza, E-50009, Zaragoza, Spain. .,Instituto de Ciencia Molecular, Universitat de València, Catedrático José Beltrán 2, Paterna, 46980, Spain.
| | - Pablo Orús
- Instituto de Ciencia de Materiales de Aragón (ICMA), Universidad de Zaragoza-CSIC, E-50009, Zaragoza, Spain.,Departamento de Física de la Materia Condensada, Universidad de Zaragoza, E-50009, Zaragoza, Spain
| | - Željko L Jelić
- University of Antwerp, Department Physics, Groenenborgerlaan 171, B-2020, Antwerp, Belgium
| | - Javier Sesé
- Instituto de Ciencia de Materiales de Aragón (ICMA), Universidad de Zaragoza-CSIC, E-50009, Zaragoza, Spain.,Departamento de Física de la Materia Condensada, Universidad de Zaragoza, E-50009, Zaragoza, Spain.,Laboratorio de Microscopías Avanzadas (LMA)-Instituto de Nanociencia de Aragón (INA), Universidad de Zaragoza, E-50018, Zaragoza, Spain
| | - Manuel Ricardo Ibarra
- Instituto de Ciencia de Materiales de Aragón (ICMA), Universidad de Zaragoza-CSIC, E-50009, Zaragoza, Spain.,Departamento de Física de la Materia Condensada, Universidad de Zaragoza, E-50009, Zaragoza, Spain.,Laboratorio de Microscopías Avanzadas (LMA)-Instituto de Nanociencia de Aragón (INA), Universidad de Zaragoza, E-50018, Zaragoza, Spain
| | - Isabel Guillamón
- Laboratorio de Bajas Temperaturas, Departamento de Física de la Materia Condensada, Instituto de Ciencia de Materiales Nicolás Cabrera, Condensed Matter Physics Center (IFIMAC), Universidad Autónoma de Madrid, 28049, Madrid, Spain
| | - Sebastián Vieira
- Laboratorio de Bajas Temperaturas, Departamento de Física de la Materia Condensada, Instituto de Ciencia de Materiales Nicolás Cabrera, Condensed Matter Physics Center (IFIMAC), Universidad Autónoma de Madrid, 28049, Madrid, Spain
| | - Juan José Palacios
- Departamento de Física de la Materia Condensada, Condensed Matter Physics Center (IFIMAC), Universidad Autónoma de Madrid, 28049, Madrid, Spain
| | - Hermann Suderow
- Laboratorio de Bajas Temperaturas, Departamento de Física de la Materia Condensada, Instituto de Ciencia de Materiales Nicolás Cabrera, Condensed Matter Physics Center (IFIMAC), Universidad Autónoma de Madrid, 28049, Madrid, Spain
| | - Milorad V Milosević
- University of Antwerp, Department Physics, Groenenborgerlaan 171, B-2020, Antwerp, Belgium
| | - José María De Teresa
- Instituto de Ciencia de Materiales de Aragón (ICMA), Universidad de Zaragoza-CSIC, E-50009, Zaragoza, Spain. .,Departamento de Física de la Materia Condensada, Universidad de Zaragoza, E-50009, Zaragoza, Spain. .,Laboratorio de Microscopías Avanzadas (LMA)-Instituto de Nanociencia de Aragón (INA), Universidad de Zaragoza, E-50018, Zaragoza, Spain.
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Pushing the limits for the highest critical currents in superconductors. Proc Natl Acad Sci U S A 2019; 116:10201-10203. [PMID: 31085652 PMCID: PMC6534980 DOI: 10.1073/pnas.1905568116] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
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23
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Control of nanostructure and pinning properties in solution deposited YBa 2Cu 3O 7-x nanocomposites with preformed perovskite nanoparticles. Sci Rep 2019; 9:5828. [PMID: 30967568 PMCID: PMC6456625 DOI: 10.1038/s41598-019-42291-x] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2018] [Accepted: 03/22/2019] [Indexed: 11/08/2022] Open
Abstract
Solution deposited YBa2Cu3O7−x (YBCO) nanocomposites with preformed nanoparticles represent a promising cost-effective approach for superior critical current properties under applied magnetic fields. Nonetheless, the majority of YBCO nanocomposites with high nanoparticle loads (>20%) suffer from nanoparticle coalescence and degraded superconducting properties. Here, we study the influence of nanoparticle concentration (0–25% mol), size (5 nm–10 nm) and composition (BaHfO3, BaZrO3) on the generation of structural defects in the epitaxial YBCO matrix, key parameter for vortex pinning. We demonstrate that flash-heated superconducting nanocomposites with 20 mol% preformed BaHfO3 or BaZrO3 perovskite secondary phases feature discrete and small (7 nm) nanoparticles and high density of YBa2Cu4O8 (Y248) intergrowths. We identify a synergy between Y248 intergrowth density and small nanoparticles to increase artificial vortex pinning centers. Also, we validate the multideposition process to successfully increase film thickness of epitaxial nanocomposites with competitive critical currents Ic at 77 K.
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Cayado P, Erbe M, Kauffmann-Weiss S, Jung A, Hänisch J, Holzapfel B. Chemical solution deposition of Y 1-x Gd x Ba 2Cu 3O 7-δ -BaHfO 3 nanocomposite films: combined influence of nanoparticles and rare-earth mixing on growth conditions and transport properties. RSC Adv 2018; 8:42398-42404. [PMID: 35558403 PMCID: PMC9092241 DOI: 10.1039/c8ra09188a] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2018] [Accepted: 12/11/2018] [Indexed: 11/21/2022] Open
Abstract
Y1−xGdxBa2Cu3O7−δ–BaHfO3 (YGBCO–BHO) nanocomposite films containing 12 mol% BHO nanoparticles and different amounts of Gd were prepared by chemical solution deposition following the trifluoroacetic route on SrTiO3 single crystals in order to study the influence of the rare earth stoichiometry on structure, morphology and superconducting properties of these films. We optimized the growth process for each of several Gd contents of the 220 nm thick YGBCO–BHO films by varying crystallization temperature and oxygen partial pressure. This optimization process led to the conclusion that mixing the rare earths in YGBCO–BHO films leads to wider growth parameter windows compared to YBCO-BHO and GdBCO-BHO films giving larger freedom for selecting the most convenient processing parameters in order to adapt to different substrates or applications which is very important for the industrial production of coated conductors. The optimized films show a continuous increase of Tc with Gd content x from ∼90 K for the YBCO-BHO films to ∼94 K for the GdBCO-BHO films. Consequently, an increase of the 77 K self-field Jc with Gd content is observed reaching values > 7 MA cm−2 for Gd contents x > 0.5. The transport properties of these films under applied magnetic fields are significantly improved with respect to the pristine YBCO films. All YGBCO–BHO nanocomposite films grew epitaxially with c-axis orientation and excellent out-of-plane and in-plane texture. The films are dense with a low amount of pores and only superficial indentations. Superconducting Y1–xGdxBa2Cu3O7–δ–BaHfO3 nanocomposite films were prepared by chemical solution deposition on SrTiO3 substrates in order to study the influence of the rare earth stoichiometry on their structure, morphology and electrical properties.![]()
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Affiliation(s)
- Pablo Cayado
- Karlsruhe Institute of Technology (KIT), Institute for Technical Physics (ITEP) Hermann-von-Helmholtz-Platz 1, 76344 Eggenstein-Leopoldshafen Germany
| | - Manuela Erbe
- Karlsruhe Institute of Technology (KIT), Institute for Technical Physics (ITEP) Hermann-von-Helmholtz-Platz 1, 76344 Eggenstein-Leopoldshafen Germany
| | - Sandra Kauffmann-Weiss
- Karlsruhe Institute of Technology (KIT), Institute for Technical Physics (ITEP) Hermann-von-Helmholtz-Platz 1, 76344 Eggenstein-Leopoldshafen Germany
| | - Alexandra Jung
- Karlsruhe Institute of Technology (KIT), Institute for Technical Physics (ITEP) Hermann-von-Helmholtz-Platz 1, 76344 Eggenstein-Leopoldshafen Germany
| | - Jens Hänisch
- Karlsruhe Institute of Technology (KIT), Institute for Technical Physics (ITEP) Hermann-von-Helmholtz-Platz 1, 76344 Eggenstein-Leopoldshafen Germany
| | - Bernhard Holzapfel
- Karlsruhe Institute of Technology (KIT), Institute for Technical Physics (ITEP) Hermann-von-Helmholtz-Platz 1, 76344 Eggenstein-Leopoldshafen Germany
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25
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Shimizu Y, Tonooka K, Yoshida Y, Furuse M, Takashima H. Growth and superconductivity of niobium titanium alloy thin films on strontium titanate (001) single-crystal substrates for superconducting joints. Sci Rep 2018; 8:15135. [PMID: 30310173 PMCID: PMC6181932 DOI: 10.1038/s41598-018-33442-7] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2018] [Accepted: 09/28/2018] [Indexed: 11/09/2022] Open
Abstract
Aiming to introduce NbTi alloy superconducting joints for REBa2Cu3O7-δ (REBCO, RE: rare-earth element) superconducting wires, NbTi alloy thin films were deposited at room temperature on SrTiO3 (STO) (001) single-crystal substrates, which have a high lattice matching with REBCO (001). The strain, crystallinity, surface morphology, and superconducting property of the films with various thicknesses were investigated. The NbTi films grew in the orientation with (110)NbTi//(001)STO:[001]NbTi and [11-0] NbTi//[100]STO; that is, the NbTi lattices had two directions in the (110) of NbTi. The strain decreased and the crystallinity improved as the film thickness increased. The films were found to crystallize immediately at the interface between the films and substrates by cross-sectional scanning transmission electron microscopy. The flat surfaces of the films have mesh-like morphologies due to the growth of elongated NbTi grains along the [100] and [010] of the STO, reflecting the in-plane two directions of the NbTi lattices. The superconducting transition temperature of the films increased with improvement in the crystallinity of the films. The preparation of superconducting NbTi alloy thin films with sufficient crystallinity at room temperature suggested the possibility of forming the films on REBCO and the applicability of the films as superconducting joints.
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Affiliation(s)
- Yuhei Shimizu
- National Institute of Advanced Industrial Science and Technology (AIST), Central 2, 1-1-1 Umezono, Tsukuba, Ibaraki, 305-8568, Japan.
- National Metrology Institute of Japan (NMIJ), National Institute of Advanced Industrial Science and Technology (AIST), Central 3, 1-1-1 Umezono, Tsukuba, Ibaraki, 305-8563, Japan.
| | - Kazuhiko Tonooka
- National Institute of Advanced Industrial Science and Technology (AIST), Central 2, 1-1-1 Umezono, Tsukuba, Ibaraki, 305-8568, Japan
| | - Yoshiyuki Yoshida
- National Institute of Advanced Industrial Science and Technology (AIST), Central 2, 1-1-1 Umezono, Tsukuba, Ibaraki, 305-8568, Japan
| | - Mitsuho Furuse
- National Institute of Advanced Industrial Science and Technology (AIST), Central 2, 1-1-1 Umezono, Tsukuba, Ibaraki, 305-8568, Japan
| | - Hiroshi Takashima
- National Institute of Advanced Industrial Science and Technology (AIST), Central 2, 1-1-1 Umezono, Tsukuba, Ibaraki, 305-8568, Japan.
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26
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Pair Distribution Function Analysis of ZrO₂ Nanocrystals and Insights in the Formation of ZrO₂-YBa₂Cu₃O₇ Nanocomposites. MATERIALS 2018; 11:ma11071066. [PMID: 29937505 PMCID: PMC6073135 DOI: 10.3390/ma11071066] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/24/2018] [Revised: 06/19/2018] [Accepted: 06/20/2018] [Indexed: 11/17/2022]
Abstract
The formation of superconducting nanocomposites from preformed nanocrystals is still not well understood. Here, we examine the case of ZrO2 nanocrystals in a YBa2Cu3O7−x matrix. First we analyzed the preformed ZrO2 nanocrystals via atomic pair distribution function analysis and found that the nanocrystals have a distorted tetragonal crystal structure. Second, we investigated the influence of various surface ligands attached to the ZrO2 nanocrystals on the distribution of metal ions in the pyrolyzed matrix via secondary ion mass spectroscopy technique. The choice of stabilizing ligand is crucial in order to obtain good superconducting nanocomposite films with vortex pinning. Short, carboxylate based ligands lead to poor superconducting properties due to the inhomogeneity of metal content in the pyrolyzed matrix. Counter-intuitively, a phosphonate ligand with long chains does not disturb the growth of YBa2Cu3O7−x. Even more surprisingly, bisphosphonate polymeric ligands provide good colloidal stability in solution but do not prevent coagulation in the final film, resulting in poor pinning. These results thus shed light on the various stages of the superconducting nanocomposite formation.
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27
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Xiang H, Qian J, Wang W, Wan Y, Yao X, Zhou L. c-Oriented YBa 2Cu 3O 7−δ film with embedded a-oriented grains grown by liquid phase epitaxy under fine-tuning supersaturation. J Appl Crystallogr 2018. [DOI: 10.1107/s1600576718004338] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
Abstract
The performance of superconductor films is related to their crystallographic orientations, which are strongly dependent on the supersaturation (σ) in the solution used for liquid phase epitaxy (LPE). To date, except for two extreme states, low and high σ for the preparation of a- and c-axis-oriented YBa2Cu3O7−δ films, respectively, little attention has been directed toward intermediate σ, which is of great importance for achieving a variety of artificial microstructures that are in principle difficult to obtain by existing crystal growth methods. Here, a further step is taken towards the comprehension of how the crystallographic orientations and microstructure are correlated with supersaturation. Fine-tuning of σ to an intermediate state is realized by introducing an additional factor, namely the holding time, that adjusts the initially uncertain state to a certain and stable one. This factor is controlled along with the commonly used variables of the amount of fresh solvent material and the melting time. Consequently, for the first time, a composite epitaxial microstructure of a c-axis-oriented YBa2Cu3O7−δ film with embedded a-axis grains on a (110) NdGaO3 substrate was successfully grown by LPE. The epitaxial interface between a- and c-axis grains potentially serves as a flux pinning site. This work provides further insights into how control of artificial microstructures can be used to enhance superconducting properties.
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28
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Rizzo F, Augieri A, Kursumovic A, Bianchetti M, Opherden L, Sieger M, Hühne R, Hänisch J, Meledin A, Van Tendeloo G, MacManus-Driscoll JL, Celentano G. Pushing the limits of applicability of REBCO coated conductor films through fine chemical tuning and nanoengineering of inclusions. NANOSCALE 2018; 10:8187-8195. [PMID: 29676427 DOI: 10.1039/c7nr09428k] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
An outstanding current carrying performance (namely critical current density, Jc) over a broad temperature range of 10-77 K for magnetic fields up to 12 T is reported for films of YBa2Cu3O7-x with Ba2Y(Nb,Ta)O6 inclusion pinning centres (YBCO-BYNTO) and thicknesses in the range of 220-500 nm. Jc values of 10 MA cm-2 were measured at 30 K - 5 T and 10 K - 9 T with a corresponding maximum of the pinning force density at 10 K close to 1 TN m-3. The system is very flexible regarding properties and microstructure tuning, and the growth window for achieving a particular microstructure is wide, which is very important for industrial processing. Hence, the dependence of Jc on the magnetic field angle was readily controlled by fine tuning the pinning microstructure. Transmission electron microscopy (TEM) analysis highlighted that higher growth rates induce more splayed and denser BYNTO nanocolumns with a matching field as high as 5.2 T. Correspondingly, a strong peak at the B||c-axis is noticed when the density of vortices is lower than the nanocolumn density. YBCO-BYNTO is a very robust and reproducible composite system for high-current coated conductors over an extended range of magnetic fields and temperatures.
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Affiliation(s)
- F Rizzo
- ENEA, Frascati Research Centre, Via E. Fermi, 45-00044 Frascati, Italy.
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29
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Córdoba R, Ibarra A, Mailly D, De Teresa JM. Vertical Growth of Superconducting Crystalline Hollow Nanowires by He + Focused Ion Beam Induced Deposition. NANO LETTERS 2018; 18:1379-1386. [PMID: 29357248 DOI: 10.1021/acs.nanolett.7b05103] [Citation(s) in RCA: 30] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Novel physical properties appear when the size of a superconductor is reduced to the nanoscale, in the range of its superconducting coherence length (ξ0). Such nanosuperconductors are being investigated for potential applications in nanoelectronics and quantum computing. The design of three-dimensional nanosuperconductors allows one to conceive novel schemes for such applications. Here, we report for the first time the use of a He+ focused-ion-beam-microscope in combination with the W(CO)6 precursor to grow three-dimensional superconducting hollow nanowires as small as 32 nm in diameter and with an aspect ratio (length/diameter) of as much as 200. Such extreme resolution is achieved by using a small He+ beam spot of 1 nm for the growth of the nanowires. As shown by transmission electron microscopy, they display grains of large size fitting with face-centered cubic WC1-x phase. The nanowires, which are grown vertically to the substrate, are felled on the substrate by means of a nanomanipulator for their electrical characterization. They become superconducting at 6.4 K and show large critical magnetic field and critical current density resulting from their quasi-one-dimensional superconducting character. These results pave the way for future nanoelectronic devices based on three-dimensional nanosuperconductors.
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Affiliation(s)
- Rosa Córdoba
- Instituto de Ciencia de Materiales de Aragón (ICMA), CSIC - Universidad de Zaragoza , 50009 Zaragoza, Spain
- Departamento de Física de la Materia Condensada, Universidad de Zaragoza , 50009 Zaragoza, Spain
| | - Alfonso Ibarra
- Laboratorio de Microscopías Avanzadas (LMA), Instituto de Nanociencia de Aragón (INA), Universidad de Zaragoza , 50009 Zaragoza, Spain
| | - Dominique Mailly
- Centre de Nanosciences et de Nanotechnologies, CNRS, Univ Paris Sud, Université Paris Saclay , 91120 Palaiseau, France
| | - José Ma De Teresa
- Instituto de Ciencia de Materiales de Aragón (ICMA), CSIC - Universidad de Zaragoza , 50009 Zaragoza, Spain
- Departamento de Física de la Materia Condensada, Universidad de Zaragoza , 50009 Zaragoza, Spain
- Laboratorio de Microscopías Avanzadas (LMA), Instituto de Nanociencia de Aragón (INA), Universidad de Zaragoza , 50009 Zaragoza, Spain
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30
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Imaging of super-fast dynamics and flow instabilities of superconducting vortices. Nat Commun 2017; 8:85. [PMID: 28729642 PMCID: PMC5519736 DOI: 10.1038/s41467-017-00089-3] [Citation(s) in RCA: 36] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2016] [Accepted: 06/01/2017] [Indexed: 11/08/2022] Open
Abstract
Quantized magnetic vortices driven by electric current determine key electromagnetic properties of superconductors. While the dynamic behavior of slow vortices has been thoroughly investigated, the physics of ultrafast vortices under strong currents remains largely unexplored. Here, we use a nanoscale scanning superconducting quantum interference device to image vortices penetrating into a superconducting Pb film at rates of tens of GHz and moving with velocities of up to tens of km/s, which are not only much larger than the speed of sound but also exceed the pair-breaking speed limit of superconducting condensate. These experiments reveal formation of mesoscopic vortex channels which undergo cascades of bifurcations as the current and magnetic field increase. Our numerical simulations predict metamorphosis of fast Abrikosov vortices into mixed Abrikosov-Josephson vortices at even higher velocities. This work offers an insight into the fundamental physics of dynamic vortex states of superconductors at high current densities, crucial for many applications.Ultrafast vortex dynamics driven by strong currents define eletromagnetic properties of superconductors, but it remains unexplored. Here, Embon et al. use a unique scanning microscopy technique to image steady-state penetration of super-fast vortices into a superconducting Pb film at rates of tens of GHz and velocities up to tens of km/s.
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31
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Horide T, Kametani F, Yoshioka S, Kitamura T, Matsumoto K. Structural Evolution Induced by Interfacial Lattice Mismatch in Self-Organized YBa 2Cu 3O 7-δ Nanocomposite Film. ACS NANO 2017; 11:1780-1788. [PMID: 28094494 DOI: 10.1021/acsnano.6b07716] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
Intriguing properties of self-organized nanocomposites of perovskite oxides are usually derived from the complex interface of constituent material phases. A sophisticated control of such a system is required for a broad range of energy and device applications, which demand a comprehensive understanding of the interface at the atomic scale. Here, we visualized and theoretically modeled the highly elastically strained nanorod, the interface region with misfit dislocations and heterointerface distortion, and the matrix with strain-induced oxygen vacancies in the self-organized YBa2Cu3O7-δ nanocomposite films with Ba perovskite nanorods. Large misfit strain was elastically accommodated in the nanocomposites, but since the elastic strain was mainly accommodated by the nanorods, the concentration of strain-induced oxygen vacancies was small enough for the matrix to keep high critical temperature (>85 K). The interfacial bonding distorted the atomic structure of YBa2Cu3O7-δ, but the thickness of distortion was limited to a few unit cells (less than the coherence length) due to the electron screening. The effect of volume fraction on elastic strain and the electron screening are crucial for strong vortex pinning without significant degradation of both the elementary pinning force and critical temperature in the nanocomposites. Thus, we comprehensively clarified the self-organized nanocomposite structure for on-demand control of superconductivity and oxide functionality in the nanocomposite engineering of perovskite oxides.
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Affiliation(s)
- Tomoya Horide
- Department of Materials Science and Engineering, Kyushu Institute of Technology , 1-1 Sensui-cho, Tobata-ku, Kitakyushu 804-8550, Japan
| | - Fumitake Kametani
- The Applied Superconductivity Center, National High Magnetic Field Laboratory, Florida State University , 2031 E. Paul Dirac Dr #240, Tallahassee, Florida 32310, United States
| | - Satoru Yoshioka
- Department of Applied Quantum Physics and Nuclear Engineering, Kyushu University , 744 Motooka, Nishi-ku, Fukuoka 819-0395, Japan
| | - Takanori Kitamura
- Department of Materials Science and Engineering, Kyushu Institute of Technology , 1-1 Sensui-cho, Tobata-ku, Kitakyushu 804-8550, Japan
| | - Kaname Matsumoto
- Department of Materials Science and Engineering, Kyushu Institute of Technology , 1-1 Sensui-cho, Tobata-ku, Kitakyushu 804-8550, Japan
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32
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Nanostructural characterization of artificial pinning centers in PLD-processed REBa 2Cu 3O 7-δ films. Ultramicroscopy 2016; 176:151-160. [PMID: 27908633 DOI: 10.1016/j.ultramic.2016.11.015] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2016] [Revised: 11/05/2016] [Accepted: 11/13/2016] [Indexed: 11/20/2022]
Abstract
In the context of high temperature superconductors, pulsed laser deposition derived GdBa2Cu3O7-δ sample with BaHfO3 nanoparticles has been reported to achieve high current density and good IC-B-θ characteristics at high temperatures. Herein, we have carried out a thorough nanostrucural characterization of BaHfO3 nanoparticles embedded in GdBCO matrix using scanning transmission electron microscopy, with an emphasis on the dispersion behavior, morphologies and nanostrain, to understand the role of BaHfO3 nanoparticles.
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33
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Serrano IG, Sesé J, Guillamón I, Suderow H, Vieira S, Ibarra MR, De Teresa JM. Thickness-modulated tungsten-carbon superconducting nanostructures grown by focused ion beam induced deposition for vortex pinning up to high magnetic fields. BEILSTEIN JOURNAL OF NANOTECHNOLOGY 2016; 7:1698-1708. [PMID: 28144519 PMCID: PMC5238659 DOI: 10.3762/bjnano.7.162] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 06/29/2016] [Accepted: 10/21/2016] [Indexed: 06/06/2023]
Abstract
We report efficient vortex pinning in thickness-modulated tungsten-carbon-based (W-C) nanostructures grown by focused ion beam induced deposition (FIBID). By using FIBID, W-C superconducting films have been created with thickness modulation properties exhibiting periodicity from 60 to 140 nm, leading to a strong pinning potential for the vortex lattice. This produces local minima in the resistivity up to high magnetic fields (2.2 T) in a broad temperature range due to commensurability effects between the pinning potential and the vortex lattice. The results show that the combination of single-step FIBID fabrication of superconducting nanostructures with built-in artificial pinning landscapes and the small intrinsic random pinning potential of this material produces strong periodic pinning potentials, maximizing the opportunities for the investigation of fundamental aspects in vortex science under changing external stimuli (e.g., temperature, magnetic field, electrical current).
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Affiliation(s)
- Ismael García Serrano
- Laboratorio de Microscopías Avanzadas (LMA), Instituto de Nanociencia de Aragón (INA), Universidad de Zaragoza, 50018 Zaragoza, Spain
- Departamento de Física de la Materia Condensada, Universidad de Zaragoza, 50009 Zaragoza, Spain
| | - Javier Sesé
- Laboratorio de Microscopías Avanzadas (LMA), Instituto de Nanociencia de Aragón (INA), Universidad de Zaragoza, 50018 Zaragoza, Spain
- Departamento de Física de la Materia Condensada, Universidad de Zaragoza, 50009 Zaragoza, Spain
| | - Isabel Guillamón
- Laboratorio de Bajas Temperaturas, Unidad Asociada UAM/CSIC, Instituto Nicolás Cabrera, Condensed Matter Physics Center (IFIMAC), Departa-mento de Física de la Materia Condensada, Universidad Autónoma de Madrid, Spain
| | - Hermann Suderow
- Laboratorio de Bajas Temperaturas, Unidad Asociada UAM/CSIC, Instituto Nicolás Cabrera, Condensed Matter Physics Center (IFIMAC), Departa-mento de Física de la Materia Condensada, Universidad Autónoma de Madrid, Spain
| | - Sebastián Vieira
- Laboratorio de Bajas Temperaturas, Unidad Asociada UAM/CSIC, Instituto Nicolás Cabrera, Condensed Matter Physics Center (IFIMAC), Departa-mento de Física de la Materia Condensada, Universidad Autónoma de Madrid, Spain
| | - Manuel Ricardo Ibarra
- Laboratorio de Microscopías Avanzadas (LMA), Instituto de Nanociencia de Aragón (INA), Universidad de Zaragoza, 50018 Zaragoza, Spain
- Departamento de Física de la Materia Condensada, Universidad de Zaragoza, 50009 Zaragoza, Spain
| | - José María De Teresa
- Laboratorio de Microscopías Avanzadas (LMA), Instituto de Nanociencia de Aragón (INA), Universidad de Zaragoza, 50018 Zaragoza, Spain
- Departamento de Física de la Materia Condensada, Universidad de Zaragoza, 50009 Zaragoza, Spain
- Instituto de Ciencia de Materiales de Aragón (ICMA), CSIC - Universidad de Zaragoza, 50009 Zaragoza, Spain
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Kwok WK, Welp U, Glatz A, Koshelev AE, Kihlstrom KJ, Crabtree GW. Vortices in high-performance high-temperature superconductors. REPORTS ON PROGRESS IN PHYSICS. PHYSICAL SOCIETY (GREAT BRITAIN) 2016; 79:116501. [PMID: 27652716 DOI: 10.1088/0034-4885/79/11/116501] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
The behavior of vortex matter in high-temperature superconductors (HTS) controls the entire electromagnetic response of the material, including its current carrying capacity. Here, we review the basic concepts of vortex pinning and its application to a complex mixed pinning landscape to enhance the critical current and to reduce its anisotropy. We focus on recent scientific advances that have resulted in large enhancements of the in-field critical current in state-of-the-art second generation (2G) YBCO coated conductors and on the prospect of an isotropic, high-critical current superconductor in the iron-based superconductors. Lastly, we discuss an emerging new paradigm of critical current by design-a drive to achieve a quantitative correlation between the observed critical current density and mesoscale mixed pinning landscapes by using realistic input parameters in an innovative and powerful large-scale time dependent Ginzburg-Landau approach to simulating vortex dynamics.
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Affiliation(s)
- Wai-Kwong Kwok
- Materials Science Division, Argonne National Laboratory, Argonne, IL 60439, USA
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35
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Intrinsic and extrinsic pinning in NdFeAs(O,F): vortex trapping and lock-in by the layered structure. Sci Rep 2016; 6:36047. [PMID: 27782196 PMCID: PMC5080545 DOI: 10.1038/srep36047] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2016] [Accepted: 10/05/2016] [Indexed: 11/24/2022] Open
Abstract
Fe-based superconductors (FBS) present a large variety of compounds whose properties are affected to different extents by their crystal structures. Amongst them, the REFeAs(O,F) (RE1111, RE being a rare-earth element) is the family with the highest critical temperature Tc but also with a large anisotropy and Josephson vortices as demonstrated in the flux-flow regime in Sm1111 (Tc ∼ 55 K). Here we focus on the pinning properties of the lower-Tc Nd1111 in the flux-creep regime. We demonstrate that for H//c critical current density Jc at high temperatures is dominated by point-defect pinning centres, whereas at low temperatures surface pinning by planar defects parallel to the c-axis and vortex shearing prevail. When the field approaches the ab-planes, two different regimes are observed at low temperatures as a consequence of the transition between 3D Abrikosov and 2D Josephson vortices: one is determined by the formation of a vortex-staircase structure and one by lock-in of vortices parallel to the layers. This is the first study on FBS showing this behaviour in the full temperature, field, and angular range and demonstrating that, despite the lower Tc and anisotropy of Nd1111 with respect to Sm1111, this compound is substantially affected by intrinsic pinning generating a strong ab-peak in Jc.
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36
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Ozaki T, Wu L, Zhang C, Jaroszynski J, Si W, Zhou J, Zhu Y, Li Q. A route for a strong increase of critical current in nanostrained iron-based superconductors. Nat Commun 2016; 7:13036. [PMID: 27708268 PMCID: PMC5059717 DOI: 10.1038/ncomms13036] [Citation(s) in RCA: 56] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2016] [Accepted: 08/29/2016] [Indexed: 11/24/2022] Open
Abstract
The critical temperature Tc and the critical current density Jc determine the limits to large-scale superconductor applications. Superconductivity emerges at Tc. The practical current-carrying capability, measured by Jc, is the ability of defects in superconductors to pin the magnetic vortices, and that may reduce Tc. Simultaneous increase of Tc and Jc in superconductors is desirable but very difficult to realize. Here we demonstrate a route to raise both Tc and Jc together in iron-based superconductors. By using low-energy proton irradiation, we create cascade defects in FeSe0.5Te0.5 films. Tc is enhanced due to the nanoscale compressive strain and proximity effect, whereas Jc is doubled under zero field at 4.2 K through strong vortex pinning by the cascade defects and surrounding nanoscale strain. At 12 K and above 15 T, one order of magnitude of Jc enhancement is achieved in both parallel and perpendicular magnetic fields to the film surface. Simultaneous increase of critical temperature and critical current in superconductors is desirable for application purpose, but very difficult to realize. Here, Ozaki et al. report a simultaneous enhancement of Tc and Jc in FeSe0.5Te0.5 films with cascade defects produced by low-energy proton irradiation.
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Affiliation(s)
- Toshinori Ozaki
- Condensed Matter Physics and Materials Science Department, Brookhaven National Laboratory, Upton, New York 11973, USA.,Department of Nanotechnology for Sustainable Energy, Kwansei Gakuin University, 2-1 Gakuen, Sanda, Hyogo 669-1337, Japan
| | - Lijun Wu
- Condensed Matter Physics and Materials Science Department, Brookhaven National Laboratory, Upton, New York 11973, USA
| | - Cheng Zhang
- Condensed Matter Physics and Materials Science Department, Brookhaven National Laboratory, Upton, New York 11973, USA
| | - Jan Jaroszynski
- National High Magnetic Field Laboratory, Florida State University, 1800 E. Paul Dirac Drive, Tallahassee, Florida 32310, USA
| | - Weidong Si
- Condensed Matter Physics and Materials Science Department, Brookhaven National Laboratory, Upton, New York 11973, USA
| | - Juan Zhou
- Condensed Matter Physics and Materials Science Department, Brookhaven National Laboratory, Upton, New York 11973, USA
| | - Yimei Zhu
- Condensed Matter Physics and Materials Science Department, Brookhaven National Laboratory, Upton, New York 11973, USA
| | - Qiang Li
- Condensed Matter Physics and Materials Science Department, Brookhaven National Laboratory, Upton, New York 11973, USA
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37
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Gazquez J, Guzman R, Mishra R, Bartolomé E, Salafranca J, Magén C, Varela M, Coll M, Palau A, Valvidares SM, Gargiani P, Pellegrin E, Herrero-Martin J, Pennycook SJ, Pantelides ST, Puig T, Obradors X. Emerging Diluted Ferromagnetism in High- Tc Superconductors Driven by Point Defect Clusters. ADVANCED SCIENCE (WEINHEIM, BADEN-WURTTEMBERG, GERMANY) 2016; 3:1500295. [PMID: 27812469 PMCID: PMC5069566 DOI: 10.1002/advs.201500295] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 09/02/2015] [Revised: 02/04/2016] [Indexed: 06/06/2023]
Abstract
Defects in ceramic materials are generally seen as detrimental to their functionality and applicability. Yet, in some complex oxides, defects present an opportunity to enhance some of their properties or even lead to the discovery of exciting physics, particularly in the presence of strong correlations. A paradigmatic case is the high-temperature superconductor YBa2Cu3O7-δ (Y123), in which nanoscale defects play an important role as they can immobilize quantized magnetic flux vortices. Here previously unforeseen point defects buried in Y123 thin films that lead to the formation of ferromagnetic clusters embedded within the superconductor are unveiled. Aberration-corrected scanning transmission microscopy has been used for exploring, on a single unit-cell level, the structure and chemistry resulting from these complex point defects, along with density functional theory calculations, for providing new insights about their nature including an unexpected defect-driven ferromagnetism, and X-ray magnetic circular dichroism for bearing evidence of Cu magnetic moments that align ferromagnetically even below the superconducting critical temperature to form a dilute system of magnetic clusters associated with the point defects.
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Affiliation(s)
- Jaume Gazquez
- Institut de Ciència de Materials de Barcelona Barcelona 08193 Spain
| | - Roger Guzman
- Institut de Ciència de Materials de Barcelona Barcelona 08193 Spain
| | - Rohan Mishra
- Department of Physics and Astronomy Vanderbilt University Nashville TN 37235 USA; Materials Science and Technology Division Oak Ridge National Laboratory Oak Ridge TN 37831 USA; Department of Mechanical Engineering and Materials Science Washington University in St. Louis St. Louis MO 63130 USA
| | - Elena Bartolomé
- Escola Universitària Salesiana de Sarrià Barcelona 08017 Spain
| | - Juan Salafranca
- Materials Science and Technology Division Oak Ridge National Laboratory Oak Ridge TN 37831 USA; Universidad Complutense de Madrid Madrid 28040 Spain
| | - Cesar Magén
- Laboratorio de Microscopías Avanzadas Instituto de Nanociencia de Aragón - ARAID Universidad de Zaragoza Zaragoza 50018 Spain
| | - Maria Varela
- Materials Science and Technology Division Oak Ridge National Laboratory Oak Ridge TN 37831 USA; Universidad Complutense de Madrid Madrid 28040 Spain
| | - Mariona Coll
- Institut de Ciència de Materials de Barcelona Barcelona 08193 Spain
| | - Anna Palau
- Institut de Ciència de Materials de Barcelona Barcelona 08193 Spain
| | | | | | - Eric Pellegrin
- ALBA Synchrotron Light Source Cerdanyola del Valles 08290 Spain
| | | | - Stephen J Pennycook
- Department of Materials Science and Engineering National University of Singapore Singapore 117574 Singapore
| | - Sokrates T Pantelides
- Department of Physics and Astronomy Vanderbilt University Nashville TN 37235 USA; Materials Science and Technology Division Oak Ridge National Laboratory Oak Ridge TN 37831 USA
| | - Teresa Puig
- Institut de Ciència de Materials de Barcelona Barcelona 08193 Spain
| | - Xavier Obradors
- Institut de Ciència de Materials de Barcelona Barcelona 08193 Spain
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38
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Malmivirta M, Palonen H, Inkinen S, Yao LD, Tikkanen J, Huhtinen H, Jha R, Awana VPS, van Dijken S, Paturi P. Dirty limit scattering behind the decreased anisotropy of doped YBa2Cu3O7-δ thin films. JOURNAL OF PHYSICS. CONDENSED MATTER : AN INSTITUTE OF PHYSICS JOURNAL 2016; 28:175702. [PMID: 27046012 DOI: 10.1088/0953-8984/28/17/175702] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
We measured the resistivity of pulsed-laser-deposited BaCeO3 (BCO)-doped YBCO thin films containing spherical BCO particles in fields up to 30 T. The average diameter of the particles depends on the dopant concentration being below 4 nm in all the samples. Raised values of the upper critical field, Bc2, were observed in all the samples. Additionally, the parameter γ, describing the electron mass anisotropy, decreased from 6.2 in the undoped sample to 3.1 in the 8 wt.% BCO-doped sample. These results can be explained by the increased number of defects decreasing the mean free path of electrons and thus lowering the coherence length, which in turn increases Bc2.
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Affiliation(s)
- M Malmivirta
- Department of Physics and Astronomy, Wihuri Physical Laboratory, University of Turku, FI-20014 Turku, Finland. University of Turku Graduate School (UTUGS), University of Turku, FI-20014 Turku, Finland
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39
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Kremen A, Wissberg S, Haham N, Persky E, Frenkel Y, Kalisky B. Mechanical Control of Individual Superconducting Vortices. NANO LETTERS 2016; 16:1626-30. [PMID: 26836018 PMCID: PMC4789753 DOI: 10.1021/acs.nanolett.5b04444] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/01/2015] [Revised: 01/15/2016] [Indexed: 05/25/2023]
Abstract
Manipulating individual vortices in a deterministic way is challenging; ideally, manipulation should be effective, local, and tunable in strength and location. Here, we show that vortices respond to local mechanical stress applied in the vicinity of the vortex. We utilized this interaction to move individual vortices in thin superconducting films via local mechanical contact without magnetic field or current. We used a scanning superconducting quantum interference device to image vortices and to apply local vertical stress with the tip of our sensor. Vortices were attracted to the contact point, relocated, and were stable at their new location. We show that vortices move only after contact and that more effective manipulation is achieved with stronger force and longer contact time. Mechanical manipulation of vortices provides a local view of the interaction between strain and nanomagnetic objects as well as controllable, effective, and reproducible manipulation technique.
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Affiliation(s)
- Anna Kremen
- Department
of Physics and Institute of Nanotechnology and Advanced Materials, Bar-Ilan University, Ramat-Gan 5290002, Israel
| | - Shai Wissberg
- Department
of Physics and Institute of Nanotechnology and Advanced Materials, Bar-Ilan University, Ramat-Gan 5290002, Israel
| | - Noam Haham
- Department
of Physics and Institute of Nanotechnology and Advanced Materials, Bar-Ilan University, Ramat-Gan 5290002, Israel
| | - Eylon Persky
- Department
of Physics and Institute of Nanotechnology and Advanced Materials, Bar-Ilan University, Ramat-Gan 5290002, Israel
| | - Yiftach Frenkel
- Department
of Physics and Institute of Nanotechnology and Advanced Materials, Bar-Ilan University, Ramat-Gan 5290002, Israel
| | - Beena Kalisky
- Department
of Physics and Institute of Nanotechnology and Advanced Materials, Bar-Ilan University, Ramat-Gan 5290002, Israel
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40
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Large pinning forces and matching effects in YBa2Cu3O(7-δ) thin films with Ba2Y(Nb/Ta)O6 nano-precipitates. Sci Rep 2016; 6:21188. [PMID: 26887291 PMCID: PMC4758043 DOI: 10.1038/srep21188] [Citation(s) in RCA: 65] [Impact Index Per Article: 8.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2015] [Accepted: 01/19/2016] [Indexed: 12/01/2022] Open
Abstract
The addition of mixed double perovskite Ba2Y(Nb/Ta)O6 (BYNTO) to YBa2Cu3O7−δ (YBCO) thin films leads to a large improvement of the in-field current carrying capability. For low deposition rates, BYNTO grows as well-oriented, densely distributed nanocolumns. We achieved a pinning force density of 25 GN/m3 at 77 K at a matching field of 2.3 T, which is among the highest values reported for YBCO. The anisotropy of the critical current density shows a complex behavior whereby additional maxima are developed at field dependent angles. This is caused by a matching effect of the magnetic fields c-axis component. The exponent N of the current-voltage characteristics (inversely proportional to the creep rate S) allows the depinning mechanism to be determined. It changes from a double-kink excitation below the matching field to pinning-potential-determined creep above it.
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41
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Miura M, Maiorov B, Balakirev FF, Kato T, Sato M, Takagi Y, Izumi T, Civale L. Upward shift of the vortex solid phase in high-temperature-superconducting wires through high density nanoparticle addition. Sci Rep 2016; 6:20436. [PMID: 26853703 PMCID: PMC4745081 DOI: 10.1038/srep20436] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2015] [Accepted: 01/04/2016] [Indexed: 11/13/2022] Open
Abstract
We show a simple and effective way to improve the vortex irreversibility line up to very high magnetic fields (60T) by increasing the density of second phase BaZrO3 nanoparticles. (Y0.77,Gd0.23)Ba2Cu3Oy films were grown on metal substrates with different concentration of BaZrO3 nanoparticles by the metal organic deposition method. We find that upon increase of the BaZrO3 concentration, the nanoparticle size remains constant but the twin-boundary density increases. Up to the highest nanoparticle concentration (n ~ 1.3 × 10(22)/m(3)), the irreversibility field (Hirr) continues to increase with no sign of saturation up to 60 T, although the vortices vastly outnumber pinning centers. We find extremely high Hirr, namely Hirr = 30 T (H||45°) and 24 T (H||c) at 65 K and 58 T (H||45°) and 45 T (H||c) at 50K. The difference in pinning landscape shifts the vortex solid-liquid transition upwards, increasing the vortex region useful for power applications, while keeping the upper critical field, critical temperature and electronic mass anisotropy unchanged.
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Affiliation(s)
- Masashi Miura
- Materials Physics and Applications Division, Los Alamos National Laboratory, Los Alamos, New Mexico 87545, USA
- Graduate School of Science & Technology, Seikei University, 3-3-1 Kichijoji-kitamachi, Musashino-shi, Tokyo 180-8633, Japan
| | - Boris Maiorov
- Materials Physics and Applications Division, Los Alamos National Laboratory, Los Alamos, New Mexico 87545, USA
| | - Fedor F. Balakirev
- Materials Physics and Applications Division, Los Alamos National Laboratory, Los Alamos, New Mexico 87545, USA
| | - Takeharu Kato
- Materials R&D Laboratory, Japan Fine Ceramics Center, 2-4-1 Mutsuno, Atuta-ku, Nagoya 456-8587, Japan
| | - Michio Sato
- Graduate School of Science & Technology, Seikei University, 3-3-1 Kichijoji-kitamachi, Musashino-shi, Tokyo 180-8633, Japan
| | - Yuji Takagi
- Superconductivity Research Laboratory, International Superconductivity Technology Center, KSP R&D Wing A-9F, 3-2-1 Sakado, Takatsu-ku, Kaswasaki-shi, Kanagawa, 213-0012 Japan
| | - Teruo Izumi
- Superconductivity Research Laboratory, International Superconductivity Technology Center, KSP R&D Wing A-9F, 3-2-1 Sakado, Takatsu-ku, Kaswasaki-shi, Kanagawa, 213-0012 Japan
| | - Leonardo Civale
- Materials Physics and Applications Division, Los Alamos National Laboratory, Los Alamos, New Mexico 87545, USA
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42
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Bartolomé E, Cayado P, Solano E, Ricart S, Gázquez J, Mundet B, Coll M, Puig T, Obradors X, Valvidares M, Herrero-Martín J, Gargiani P, Pellegrin E. Magnetic stability against calcining of microwave-synthesized CoFe2O4 nanoparticles. NEW J CHEM 2016. [DOI: 10.1039/c6nj00705h] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The magnetization of microwave-synthesized CoFe2O4 nanoparticles, after the stringent thermal treatment that would be necessary to prepare hybrid ferromagnetic–YBCO films, is preserved.
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Affiliation(s)
- Elena Bartolomé
- Escola Universitària Salesiana de Sarrià (EUSS)
- 08710 Barcelona
- Spain
| | - Pablo Cayado
- Institut de Ciència de Materials de Barcelona
- Spain
| | - Eduardo Solano
- Department of Solid State Sciences
- Faculty of Sciences
- Ghent University
- 9000 Ghent
- Belgium
| | | | | | | | - Mariona Coll
- Institut de Ciència de Materials de Barcelona
- Spain
| | - Teresa Puig
- Institut de Ciència de Materials de Barcelona
- Spain
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43
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Hosono H, Tanabe K, Takayama-Muromachi E, Kageyama H, Yamanaka S, Kumakura H, Nohara M, Hiramatsu H, Fujitsu S. Exploration of new superconductors and functional materials, and fabrication of superconducting tapes and wires of iron pnictides. SCIENCE AND TECHNOLOGY OF ADVANCED MATERIALS 2015; 16:033503. [PMID: 27877784 PMCID: PMC5099821 DOI: 10.1088/1468-6996/16/3/033503] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/02/2015] [Accepted: 04/28/2015] [Indexed: 06/02/2023]
Abstract
This review shows the highlights of a 4-year-long research project supported by the Japanese Government to explore new superconducting materials and relevant functional materials. The project found several tens of new superconductors by examining ∼1000 materials, each of which was chosen by Japanese experts with a background in solid state chemistry. This review summarizes the major achievements of the project in newly found superconducting materials, and the fabrication wires and tapes of iron-based superconductors; it incorporates a list of ∼700 unsuccessful materials examined for superconductivity in the project. In addition, described are new functional materials and functionalities discovered during the project.
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Affiliation(s)
- Hideo Hosono
- Frontier Research Center, Tokyo Institute of Technology, Yokohama 226-8503, Japan
- Materials and Structures Laboratory, Tokyo Institute of Technology, Yokohama 226-8503, Japan
- Materials Research Center for Element Strategy, Tokyo Institute of Technology, Yokohama 226-8503, Japan
| | - Keiichi Tanabe
- Superconductivity Research Laboratory, International Superconductivity Technology Center (ISTEC), 2-11-19 Minowa-cho, Kohoku-ku, Yokohama, Kanagawa 223-0051, Japan
| | | | - Hiroshi Kageyama
- Department of Energy and Hydrocarbon Chemistry, Graduate School of Engineering, Kyoto University, Nishikyo-ku, Kyoto 615-8510, Japan
| | - Shoji Yamanaka
- Department of Applied Chemistry, Graduate School of Engineering, Hiroshima University, Higashi-Hiroshima 739-8527, Japan
| | - Hiroaki Kumakura
- National Institute for Materials Science, 1-2-1 Sengen, Tsukuba, Ibaraki 305-0047, Japan
| | - Minoru Nohara
- Department of Physics, Okayama University, Okayama 700-8530, Japan
| | - Hidenori Hiramatsu
- Materials and Structures Laboratory, Tokyo Institute of Technology, Yokohama 226-8503, Japan
- Materials Research Center for Element Strategy, Tokyo Institute of Technology, Yokohama 226-8503, Japan
| | - Satoru Fujitsu
- Materials Research Center for Element Strategy, Tokyo Institute of Technology, Yokohama 226-8503, Japan
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44
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Embon L, Anahory Y, Suhov A, Halbertal D, Cuppens J, Yakovenko A, Uri A, Myasoedov Y, Rappaport ML, Huber ME, Gurevich A, Zeldov E. Probing dynamics and pinning of single vortices in superconductors at nanometer scales. Sci Rep 2015; 5:7598. [PMID: 25564043 PMCID: PMC4288220 DOI: 10.1038/srep07598] [Citation(s) in RCA: 65] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/03/2014] [Accepted: 12/03/2014] [Indexed: 11/08/2022] Open
Abstract
The dynamics of quantized magnetic vortices and their pinning by materials defects determine electromagnetic properties of superconductors, particularly their ability to carry non-dissipative currents. Despite recent advances in the understanding of the complex physics of vortex matter, the behavior of vortices driven by current through a multi-scale potential of the actual materials defects is still not well understood, mostly due to the scarcity of appropriate experimental tools capable of tracing vortex trajectories on nanometer scales. Using a novel scanning superconducting quantum interference microscope we report here an investigation of controlled dynamics of vortices in lead films with sub-Angstrom spatial resolution and unprecedented sensitivity. We measured, for the first time, the fundamental dependence of the elementary pinning force of multiple defects on the vortex displacement, revealing a far more complex behavior than has previously been recognized, including striking spring softening and broken-spring depinning, as well as spontaneous hysteretic switching between cellular vortex trajectories. Our results indicate the importance of thermal fluctuations even at 4.2 K and of the vital role of ripples in the pinning potential, giving new insights into the mechanisms of magnetic relaxation and electromagnetic response of superconductors.
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Affiliation(s)
- L. Embon
- Department of Condensed Matter Physics, Weizmann Institute of Science, Rehovot, 7610001, Israel
| | - Y. Anahory
- Department of Condensed Matter Physics, Weizmann Institute of Science, Rehovot, 7610001, Israel
| | - A. Suhov
- Department of Condensed Matter Physics, Weizmann Institute of Science, Rehovot, 7610001, Israel
| | - D. Halbertal
- Department of Condensed Matter Physics, Weizmann Institute of Science, Rehovot, 7610001, Israel
| | - J. Cuppens
- Department of Condensed Matter Physics, Weizmann Institute of Science, Rehovot, 7610001, Israel
| | - A. Yakovenko
- Department of Condensed Matter Physics, Weizmann Institute of Science, Rehovot, 7610001, Israel
| | - A. Uri
- Department of Condensed Matter Physics, Weizmann Institute of Science, Rehovot, 7610001, Israel
| | - Y. Myasoedov
- Department of Condensed Matter Physics, Weizmann Institute of Science, Rehovot, 7610001, Israel
| | - M. L. Rappaport
- Department of Condensed Matter Physics, Weizmann Institute of Science, Rehovot, 7610001, Israel
| | - M. E. Huber
- Department of Physics, University of Colorado Denver, Denver, 80217, USA
| | - A. Gurevich
- Department of Physics, Old Dominion University, Norfolk, VA 23529-0116, USA
| | - E. Zeldov
- Department of Condensed Matter Physics, Weizmann Institute of Science, Rehovot, 7610001, Israel
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45
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Bose S, Ayyub P. A review of finite size effects in quasi-zero dimensional superconductors. REPORTS ON PROGRESS IN PHYSICS. PHYSICAL SOCIETY (GREAT BRITAIN) 2014; 77:116503. [PMID: 25373494 DOI: 10.1088/0034-4885/77/11/116503] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
Quantum confinement and surface effects (SEs) dramatically modify most solid state phenomena as one approaches the nanometer scale, and superconductivity is no exception. Though we may expect significant modifications from bulk superconducting properties when the system dimensions become smaller than the characteristic length scales for bulk superconductors-such as the coherence length or the penetration depth-it is now established that there is a third length scale which ultimately determines the critical size at which Cooper pairing is destroyed. In quasi-zero-dimensional (0D) superconductors (e.g. nanocrystalline materials, isolated or embedded nanoparticles), one may define a critical particle diameter below which the mean energy level spacing arising from quantum confinement becomes equal to the bulk superconducting energy gap. The so-called Anderson criterion provides a remarkably accurate estimate of the limiting size for the destabilization of superconductivity in nanosystems. This review of size effects in quasi-0D superconductors is organized as follows. A general summary of size effects in nanostructured superconductors (section 1) is followed by a brief overview of their synthesis (section 2) and characterization using a variety of techniques (section 3). Section 4 reviews the size-evolution of important superconducting parameters-the transition temperature, critical fields and critical current-as the Anderson limit is approached from above. We then discuss the effect of thermodynamic fluctuations (section 5), which become significant in confined systems. Improvements in fabrication methods and the increasing feasibility of addressing individual nanoparticles using scanning probe techniques have lately opened up new directions in the study of nanoscale superconductivity. Section 6 reviews both experimental and theoretical aspects of the recently discovered phenomena of 'parity effect' and 'shell effect' that lead to a strong, non-monotonic size dependence of the superconducting energy gap and associated properties. Finally, we discuss in section 7 the properties of ordered heterostructures (bilayers and multilayers of alternating superconducting and normal phases) and disordered heterostructures (nanocomposites consisting of superconducting and normal phases), which are primarily controlled by the proximity effect.
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Affiliation(s)
- Sangita Bose
- UM-DAE Center for Excellence in Basic Sciences, University of Mumbai, Vidhyanagari Campus, Santacruz, Mumbai 400098, India
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46
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Senatore C, Alessandrini M, Lucarelli A, Tediosi R, Uglietti D, Iwasa Y. Progresses and challenges in the development of high-field solenoidal magnets based on RE123 coated conductors. SUPERCONDUCTOR SCIENCE & TECHNOLOGY 2014; 27:103001. [PMID: 32863600 PMCID: PMC7453433 DOI: 10.1088/0953-2048/27/10/103001] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
Recent progresses in the second generation REBa2Cu3O7 - x (RE123) coated conductor (CC) have paved a way for the development of superconducting solenoids capable of generating fields well above 23.5 T, i.e. the lim it of NbTi-N b3Sn-based magnets. However, the RE123 magnet still poses several fundamental and engineering challenges. In this work we review the state-of- the-art of conductor and magnet technologies. The goal is to illustrate a close synergetic relationship between evolution of high-field magnets and advancement in superconductor technology. The paper is organized in three parts: (1) the basics of RE123 CC fabrication technique, including latest developments to improve conductor performance and production throughput; (2) critical issues and innovative design concepts for the RE123-based magnet; and (3) an overview of noteworthy ongoing magnet projects.
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Affiliation(s)
- Carmine Senatore
- Département de Physique de la Matière Condensée (DPMC) and Département de Physique Appliquée (GAP), University of Geneva, Geneva CH-1211, Switzerland
| | | | | | | | - Davide Uglietti
- EPFL-CRPP, Fusion Technology, 5232 Villigen-PSI, Switzerland
| | - Yukikazu Iwasa
- Francis Bitter Magnet Laboratory, Massachusetts Institute of Technology, Cambridge, MA 02139, USA
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47
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Miura M, Maiorov B, Kato T, Shimode T, Wada K, Adachi S, Tanabe K. Strongly enhanced flux pinning in one-step deposition of BaFe₂(As₀.₆₆P₀.₃₃)₂ superconductor films with uniformly dispersed BaZrO₃ nanoparticles. Nat Commun 2014; 4:2499. [PMID: 24051678 PMCID: PMC3791461 DOI: 10.1038/ncomms3499] [Citation(s) in RCA: 76] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2013] [Accepted: 08/23/2013] [Indexed: 12/03/2022] Open
Abstract
The high upper critical field and low anisotropy of the iron-based superconductor BaFe2As2 make it promising for its use in the construction of superconducting magnets. However, its critical current density in high magnetic fields needs to be improved. Here we demonstrate a simple, one-step and industrially scalable means of achieving just this. We show that introducing controlled amounts of uniformly dispersed BaZrO3 nanoparticles into carrier-doped BaFe2As2 significantly improves its superconducting performance without degrading its structural or superconducting properties. Our BaFe2(As0.66P0.33)2 films also exhibit an increase in both the irreversibility line and critical current density at all magnetic-field orientations. These films exhibit nearly isotropic critical current densities in excess of 1.5 MA cm−2 at 15 K and 1 T—seven times higher than previously reported for BaFe2As2 films. The vortex-pinning force in these films reaches ~59 GN m−3 at 5 K and 3–9 T, substantially higher than that of the conventional Nb3Sn wire. Iron-based superconductors are promising for its use in building superconducting magnets; however, their high-field critical current density needs to be improved. Miura et al. show that this can be achieved with a one-step growth process that uniformly incorporates BaZrO3 nanoparticles into BaFe2As2 films.
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Affiliation(s)
- Masashi Miura
- 1] Superconductivity Research Laboratory, International Superconductivity Technology Center, 10-13, Shinonome 1-chome, Koto-ku, Tokyo 135-0062, Japan [2] Graduate School of Science and Technology, Seikei University, 3-3-1 Kichijoji-kitamachi, Musashino-shi, Tokyo 180-8633, Japan
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48
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Lim YS, Kwon HS, Jeong J, Kim JY, Kim H, Ko MJ, Jeong U, Lee DK. Colloidal solution-processed CuInSe2 solar cells with significantly improved efficiency up to 9% by morphological improvement. ACS APPLIED MATERIALS & INTERFACES 2014; 6:259-267. [PMID: 24328265 DOI: 10.1021/am4040976] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
We demonstrate here that an improvement in the green density leads to a great enhancement in the photovoltaic performance of CuInSe2 (CISe) solar cells fabricated with Cu-In nanoparticle precursor films via colloidal solution deposition. Cold-isostatic pressing (CIP) increases the precursor film density by ca. 20%, which results in an appreciable improvement in the microstructural features of the sintered CISe film in terms of a lower porosity, a more uniform surface morphology, and a thinner MoSe2 layer. The low-band-gap (1.0 eV) CISe solar cells with the CIP-treated films exhibit greatly enhanced open-circuit voltage (V(OC), typically from 0.265 to 0.413 V) and fill factor (FF, typically from 0.34 to 0.55), compared to the control devices. As a consequence, an almost 3-fold increase in the average efficiency, from 3.0 to 8.2% (with the highest value of 9.02%), is realized. Diode analysis reveals that the enhanced V(OC) and FF are essentially attributed to the reduced reverse saturation current density and diode ideality factor. This is associated with suppressed recombination, likely due to the reduction in recombination sites at grain/air surfaces, intergranular interfaces, and defective CISe/CdS junctions. From the temperature dependences of V(OC), it is revealed that CIP-treated devices suffer less from interface recombination.
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Affiliation(s)
- Ye Seul Lim
- Photo-electronic Hybrids Research Center, Korea Institute of Science and Technology (KIST) , Seoul 136-791, Korea
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Carretero-Genevrier A, Puig T, Obradors X, Mestres N. Ferromagnetic 1D oxide nanostructures grown from chemical solutions in confined geometries. Chem Soc Rev 2014; 43:2042-54. [DOI: 10.1039/c3cs60288e] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
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Zhao Y, Wu W, Tang X, Andersen NH, Han Z, Grivel JC. Epitaxial growth of YBa2Cu3O7−x films on Ce0.9La0.1O2−y buffered yttria-stabilized zirconia substrates by an all-chemical-solution route. CrystEngComm 2014. [DOI: 10.1039/c4ce00230j] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A high critical current density of 3 MA cm−2 (77 K, self-field) was achieved on a YBa2Cu3O7 film deposited on Ce0.9La0.1O2 buffered yttria-stabilized zirconia substrate, which is an all-chemical derived configuration.
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Affiliation(s)
- Yue Zhao
- Department of Energy Conversion and Storage
- Technical University of Denmark
- 4000 Roskilde, Denmark
| | - Wei Wu
- Department of Energy Conversion and Storage
- Technical University of Denmark
- 4000 Roskilde, Denmark
- Department of Physics
- Tsinghua University
| | - Xiao Tang
- Department of Energy Conversion and Storage
- Technical University of Denmark
- 4000 Roskilde, Denmark
| | | | - Zhenghe Han
- Department of Physics
- Tsinghua University
- 100084 Beijing, People's Republic of China
| | - Jean-Claude Grivel
- Department of Energy Conversion and Storage
- Technical University of Denmark
- 4000 Roskilde, Denmark
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