1
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Svetlizky I, Kim S, Weitz DA, Spaepen F. Dislocation interactions during plastic relaxation of epitaxial colloidal crystals. Nat Commun 2023; 14:5760. [PMID: 37717044 PMCID: PMC10505195 DOI: 10.1038/s41467-023-41430-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2023] [Accepted: 09/05/2023] [Indexed: 09/18/2023] Open
Abstract
The severe difficulty to resolve simultaneously both the macroscopic deformation process and the dislocation dynamics on the atomic scale limits our understanding of crystal plasticity. Here we use colloidal crystals, imaged on the single particle level by high-speed three-dimensional (3D) confocal microscopy, and resolve in real-time both the relaxation of the epitaxial misfit strain and the accompanying evolution of dislocations. We show how dislocation interactions give rise to the formation of complex dislocation networks in 3D and to unexpectedly sharp plastic relaxation. The sharp relaxation is facilitated by attractive interactions that promote the formation of new dislocations that are more efficient in mediating strain. Dislocation networks form fragmented structures, as dislocation growth is blocked by either attractive interactions, which result in the formation of sessile dislocation junctions, or by repulsion from perpendicular segments. The strength of these blocking mechanisms decreases with the thickness of the crystal film. These results reveal the critical role of dislocation interactions in plastic deformation of thin films and can be readily generalized from the colloidal to the atomic scale.
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Affiliation(s)
- Ilya Svetlizky
- School of Engineering and Applied Sciences (SEAS), Harvard University, Cambridge, MA, USA.
| | - Seongsoo Kim
- School of Engineering and Applied Sciences (SEAS), Harvard University, Cambridge, MA, USA
| | - David A Weitz
- School of Engineering and Applied Sciences (SEAS), Harvard University, Cambridge, MA, USA
- Department of Physics, Harvard University, Cambridge, MA, USA
- Wyss Institute for Biologically Inspired Engineering, Harvard University, Cambridge, MA, USA
| | - Frans Spaepen
- School of Engineering and Applied Sciences (SEAS), Harvard University, Cambridge, MA, USA.
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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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Fan P, Chen H, Zhou X, Cao L, Li G, Li M, Qian G, Xing Y, Shen C, Wang X, Jin C, Gu G, Ding H, Gao HJ. Nanoscale Manipulation of Wrinkle-Pinned Vortices in Iron-Based Superconductors. NANO LETTERS 2023; 23:4541-4547. [PMID: 37162755 DOI: 10.1021/acs.nanolett.3c00982] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/11/2023]
Abstract
The controlled manipulation of Abrikosov vortices is essential for both fundamental science and logical applications. However, achieving nanoscale manipulation of vortices while simultaneously measuring the local density of states within them remains challenging. Here, we demonstrate the manipulation of Abrikosov vortices by moving the pinning center, namely one-dimensional wrinkles, on the terminal layers of Fe(Te,Se) and LiFeAs, by utilizing low-temperature scanning tunneling microscopy/spectroscopy (STM/S). The wrinkles trap the Abrikosov vortices induced by the external magnetic field. In some of the wrinkle-pinned vortices, robust zero-bias conductance peaks are observed. We tailor the wrinkle into short pieces and manipulate the wrinkles by using an STM tip. Strikingly, we demonstrate that the pinned vortices move together with these wrinkles even at high magnetic field up to 6 T. Our results provide a universal and effective routine for manipulating wrinkle-pinned vortices and simultaneously measuring the local density of states on the iron-based superconductor surfaces.
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Affiliation(s)
- Peng Fan
- Beijing National Center for Condensed Matter Physics and Institute of Physics, Chinese Academy of Sciences, Beijing 100190, P. R. China
- School of Physical Sciences, Chinese Academy of Sciences, Beijing 100190, P. R. China
| | - Hui Chen
- Beijing National Center for Condensed Matter Physics and Institute of Physics, Chinese Academy of Sciences, Beijing 100190, P. R. China
- School of Physical Sciences, Chinese Academy of Sciences, Beijing 100190, P. R. China
- Hefei National Laboratory, Hefei, Anhui 230088, P. R. China
| | - Xingtai Zhou
- Beijing National Center for Condensed Matter Physics and Institute of Physics, Chinese Academy of Sciences, Beijing 100190, P. R. China
- School of Physical Sciences, Chinese Academy of Sciences, Beijing 100190, P. R. China
| | - Lu Cao
- Beijing National Center for Condensed Matter Physics and Institute of Physics, Chinese Academy of Sciences, Beijing 100190, P. R. China
- School of Physical Sciences, Chinese Academy of Sciences, Beijing 100190, P. R. China
| | - Geng Li
- Beijing National Center for Condensed Matter Physics and Institute of Physics, Chinese Academy of Sciences, Beijing 100190, P. R. China
- School of Physical Sciences, Chinese Academy of Sciences, Beijing 100190, P. R. China
- Hefei National Laboratory, Hefei, Anhui 230088, P. R. China
| | - Meng Li
- Beijing National Center for Condensed Matter Physics and Institute of Physics, Chinese Academy of Sciences, Beijing 100190, P. R. China
- School of Physical Sciences, Chinese Academy of Sciences, Beijing 100190, P. R. China
| | - Guojian Qian
- Beijing National Center for Condensed Matter Physics and Institute of Physics, Chinese Academy of Sciences, Beijing 100190, P. R. China
- School of Physical Sciences, Chinese Academy of Sciences, Beijing 100190, P. R. China
| | - Yuqing Xing
- Beijing National Center for Condensed Matter Physics and Institute of Physics, Chinese Academy of Sciences, Beijing 100190, P. R. China
- School of Physical Sciences, Chinese Academy of Sciences, Beijing 100190, P. R. China
| | - Chengmin Shen
- Beijing National Center for Condensed Matter Physics and Institute of Physics, Chinese Academy of Sciences, Beijing 100190, P. R. China
- School of Physical Sciences, Chinese Academy of Sciences, Beijing 100190, P. R. China
| | - Xiancheng Wang
- Beijing National Center for Condensed Matter Physics and Institute of Physics, Chinese Academy of Sciences, Beijing 100190, P. R. China
- School of Physical Sciences, Chinese Academy of Sciences, Beijing 100190, P. R. China
| | - Changqing Jin
- Beijing National Center for Condensed Matter Physics and Institute of Physics, Chinese Academy of Sciences, Beijing 100190, P. R. China
- School of Physical Sciences, Chinese Academy of Sciences, Beijing 100190, P. R. China
| | - Genda Gu
- Condensed Matter Physics and Materials Science Department, Brookhaven National Laboratory, Upton, New York 11973, United States
| | - Hong Ding
- Beijing National Center for Condensed Matter Physics and Institute of Physics, Chinese Academy of Sciences, Beijing 100190, P. R. China
| | - Hong-Jun Gao
- Beijing National Center for Condensed Matter Physics and Institute of Physics, Chinese Academy of Sciences, Beijing 100190, P. R. China
- School of Physical Sciences, Chinese Academy of Sciences, Beijing 100190, P. R. China
- Hefei National Laboratory, Hefei, Anhui 230088, P. R. China
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4
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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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5
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Zhang J, Wu H, Zhao G, Han L, Zhang J. A Review on Strain Study of Cuprate Superconductors. NANOMATERIALS (BASEL, SWITZERLAND) 2022; 12:nano12193340. [PMID: 36234468 PMCID: PMC9565469 DOI: 10.3390/nano12193340] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/11/2022] [Revised: 09/20/2022] [Accepted: 09/21/2022] [Indexed: 06/13/2023]
Abstract
Cuprate superconductors have attracted extensive attention due to their broad promising application prospects. Among the factors affecting superconductivity, the effect of strain cannot be ignored, which can significantly enhance or degrade superconductivity. In this review, we discuss and summarize the methods of applying strain to cuprate superconductors, strain measurement techniques, and the influence of strain on superconductivity. Among them, we pay special attention to the study of strain in high-temperature superconducting (HTS) films and coating. We expect this review can guide further research in the field of cuprate superconductors.
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Affiliation(s)
- Jian Zhang
- Institute of Environmental Research at Greater Bay Area, Key Laboratory for Water Quality and Conservation of the Pearl River Delta, Ministry of Education, Guangzhou University, Guangzhou 510006, China
- Key Laboratory of Spin Electron and Nanomaterials of Anhui Higher Education Institutes, Suzhou University, Suzhou 234000, China
| | - Haiyan Wu
- Institute of Environmental Research at Greater Bay Area, Key Laboratory for Water Quality and Conservation of the Pearl River Delta, Ministry of Education, Guangzhou University, 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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6
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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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7
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Chen J, Huang R, Zhou X, Zhou D, Li M, Bai C, Liu Z, Cai C. Nucleation and epitaxy growth of high-entropy REBa2Cu3O7– (RE= Y, Dy, Gd, Sm, Eu) thin films by metal organic deposition. J RARE EARTH 2022. [DOI: 10.1016/j.jre.2022.06.006] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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8
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Zhang X, Suo H, Zhang Z, Ye S, Ma L, Liu M, Ji Y, Wang X, Wang L, Wang Q, Shaneen K. Two-dimensional X-ray diffraction characterization of the growth mechanism of double perovskite-structured nanoparticles in thin films prepared via metal-organic decomposition. CrystEngComm 2022. [DOI: 10.1039/d1ce01301g] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
ABSTRACT: Doping of nanoparticles is one of the effective methods in order to obtain nanocomposite thin films with significantly improved performance. The complete understanding of nucleation and growth mechanism for...
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9
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Linden Y, Iliffe WR, He G, Danaie M, Fischer DX, Eisterer M, Speller SC, Grovenor CRM. Analysing neutron radiation damage in YBa 2 Cu 3 O 7-x high temperature superconductor tapes. J Microsc 2021; 286:3-12. [PMID: 34879153 DOI: 10.1111/jmi.13078] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2021] [Revised: 10/27/2021] [Accepted: 11/29/2021] [Indexed: 11/30/2022]
Abstract
Superconducting windings will be necessary in future fusion reactors to generate the strong magnetic fields needed to confine the plasma, and these superconducting materials will inevitably be exposed to neutron damage. It is known that this exposure results in the creation of isolated damage cascades, but the presence of these defects alone is not sufficient to explain the degradation of macroscopic superconducting properties and a quantitative method is needed to assess the subtle lattice damage in between the clusters. We have studied REBCO coated conductors irradiated with neutrons to a cumulative dose of 3.3×1022 n*m-2 that show a degradation of both Tc and Jc values, and use HRTEM analysis to show that this irradiation introduces ∼10 nm amorphous collision cascades. In addition we introduce a new method for the analysis of these images to quantify the degree of lattice disorder in the apparently perfect matrix between these cascades. This method utilises Fast Fourier and Discrete Cosine Transformations of a statistically-relevant number of HRTEM images of pristine, neutron-irradiated, and amorphous samples, and extracts the degree of randomness in terms of entropy values. Our results show that these entropy values in both mid-frequency band FFT and DCT domains correlate with the expected level of lattice damage, with the pristine samples having the lowest and the fully amorphous regions the highest entropy values. Our methodology allows us to quantify 'invisible' lattice damage to and correlate these values to the degradation of superconducting properties, and also has relevance for a wider range of applications in the field of electron microscopy where small changes in lattice perfection need to be measured. This article is protected by copyright. All rights reserved.
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Affiliation(s)
- Y Linden
- Department of Materials, University of Oxford, Parks Rd, Oxford, OX1 3PH, UK
| | - W R Iliffe
- Department of Materials, University of Oxford, Parks Rd, Oxford, OX1 3PH, UK
| | - G He
- Department of Materials, University of Oxford, Parks Rd, Oxford, OX1 3PH, UK
| | - M Danaie
- Electron Physical Sciences Imaging Centre (ePSIC), Diamond Light Source, Didcot, UK
| | - D X Fischer
- Plasma Science and Fusion Center, Massachusetts Institute of Technology, Cambridge, MA, USA
| | - M Eisterer
- Atominstitut, TU Wien, Stadionallee2, A-1020, Vienna, Austria
| | - S C Speller
- Department of Materials, University of Oxford, Parks Rd, Oxford, OX1 3PH, UK
| | - C R M Grovenor
- Department of Materials, University of Oxford, Parks Rd, Oxford, OX1 3PH, UK
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10
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Cai P, Wang C, Gao H, Chen X. Mechanomaterials: A Rational Deployment of Forces and Geometries in Programming Functional Materials. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2021; 33:e2007977. [PMID: 34197013 DOI: 10.1002/adma.202007977] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/24/2020] [Revised: 01/26/2021] [Indexed: 06/13/2023]
Abstract
The knowledge of mechanics of materials has been extensively implemented in developing functional materials, giving rise to recent advances in soft actuators, flexible electronics, mechanical metamaterials, tunable mechanochromics, regenerative mechanomedicine, etc. While conventional mechanics of materials offers passive access to mechanical properties of materials in existing forms, a paradigm shift is emerging toward proactive programming of materials' functionality by leveraging the force-geometry-property relationships. Here, such a rising field is coined as "mechanomaterials". To profile the concept, the design principles in this field at four scales is first outlined, namely the atomic scale, the molecular scale, the manipulation of nanoscale materials, and the microscale design of structural materials. A variety of techniques have been recruited to deliver the multiscale programming of functional mechanomaterials, such as strain engineering, capillary assembly, topological interlocking, kirigami, origami, to name a few. Engineering optical and biological functionalities have also been achieved by implementing the fundamentals of mechanochemistry and mechanobiology. Nonetheless, the field of mechanomaterials is still in its infancy, with many open challenges and opportunities that need to be addressed. The authors hope this review can serve as a modest spur to attract more researchers to further advance this field.
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Affiliation(s)
- Pingqiang Cai
- Innovative Center for Flexible Devices, School of Materials Science and Engineering, Nanyang Technological University, 50 Nanyang Avenue, Singapore, 639798, Singapore
| | - Changxian Wang
- Innovative Center for Flexible Devices, School of Materials Science and Engineering, Nanyang Technological University, 50 Nanyang Avenue, Singapore, 639798, Singapore
| | - Huajian Gao
- School of Mechanical & Aerospace Engineering, Nanyang Technological University, 50 Nanyang Avenue, Singapore, 639798, Singapore
| | - Xiaodong Chen
- Innovative Center for Flexible Devices, School of Materials Science and Engineering, Nanyang Technological University, 50 Nanyang Avenue, Singapore, 639798, Singapore
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11
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Zhang J, Wang W, Wang N, Wang M, Qi Y. Atomic-resolution study on the interface structure and strain state reversion of the Bi2Sr2CuO6+δ/MgO heterostructure. J Colloid Interface Sci 2021; 592:291-295. [DOI: 10.1016/j.jcis.2021.02.063] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2020] [Revised: 02/06/2021] [Accepted: 02/14/2021] [Indexed: 11/26/2022]
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12
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Collomb D, Zhang M, Yuan W, Bending SJ. Imaging of Strong Nanoscale Vortex Pinning in GdBaCuO High-Temperature Superconducting Tapes. NANOMATERIALS (BASEL, SWITZERLAND) 2021; 11:1082. [PMID: 33922201 PMCID: PMC8145501 DOI: 10.3390/nano11051082] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/17/2021] [Revised: 04/09/2021] [Accepted: 04/17/2021] [Indexed: 11/16/2022]
Abstract
The high critical current density of second-generation high-temperature superconducting (2G-HTS) tapes is the result of the systematic optimisation of the pinning landscape for superconducting vortices through careful engineering of the size and density of defects and non-superconducting second phases. Here, we use scanning Hall probe microscopy to conduct a vortex-resolved study of commercial GdBaCuO tapes in low fields for the first time and complement this work with "local" magnetisation and transport measurements. Magnetic imaging reveals highly disordered vortex patterns reflecting the presence of strong pinning from a dense distribution of nanoscale Gd2O3 second-phase inclusions in the superconducting film. However, we find that the measured vortex profiles are unexpectedly broad, with full-width-half-maxima typically of 6 μm, and exhibit almost no temperature dependence in the range 10-85 K. Since the lateral displacements of pinned vortex cores are not expected to exceed the superconducting layer thickness, this suggests that the observed broadening is caused by the disruption of the circulating supercurrents due to the high density of nanoscale pinning sites. Deviations of our local magnetisation data from an accepted 2D Bean critical state model also indicate that critical state profiles relax quite rapidly by flux creep. Our measurements provide important information about the role second-phase defects play in enhancing the critical current in these tapes and demonstrate the power of magnetic imaging as a complementary tool in the optimisation of vortex pinning phenomena in 2G-HTS tapes.
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Affiliation(s)
- David Collomb
- Department of Physics, University of Bath, Claverton Down, Bath BA2 7AY, UK;
| | - Min Zhang
- Applied Superconductivity Laboratory, Department of Electronics and Electrical Engineering, University of Strathclyde, Glasgow G1 1XQ, UK; (M.Z.); (W.Y.)
| | - Weijia Yuan
- Applied Superconductivity Laboratory, Department of Electronics and Electrical Engineering, University of Strathclyde, Glasgow G1 1XQ, UK; (M.Z.); (W.Y.)
| | - Simon J. Bending
- Department of Physics, University of Bath, Claverton Down, Bath BA2 7AY, UK;
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13
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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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14
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Aye MM, Rivasto E, Khan MZ, Rijckaert H, Salojärvi E, Haalisto C, Mäkilä E, Palonen H, Huhtinen H, Van Driessche I, Paturi P. Control of the nanosized defect network in superconducting thin films by target grain size. Sci Rep 2021; 11:6010. [PMID: 33727621 PMCID: PMC7966807 DOI: 10.1038/s41598-021-85304-4] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2021] [Accepted: 02/24/2021] [Indexed: 01/31/2023] Open
Abstract
A nanograined YBCO target, where a great number of grain boundaries, pores etc. exist, is shown to hold an alternative approach to future pulsed laser deposition based high-temperature superconductor thin film and coated conductor technologies. Although the nanograined material is introduced earlier, in this work, we comprehensively demonstrate the modified ablation process, together with unconventional nucleation and growth mechanisms that produces dramatically enhanced flux pinning properties. The results can be generalized to other complex magnetic oxides, where an increased number of defects are needed for modifying their magnetic and electrical properties, thus improving their usability in the future technological challenges.
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Affiliation(s)
- Moe Moe Aye
- grid.1374.10000 0001 2097 1371Wihuri Physical Laboratory, Department of Physics and Astronomy, University of Turku, 20014 Turku, Finland ,grid.1374.10000 0001 2097 1371University of Turku Graduate School (UTUGS), University of Turku, 20014 Turku, Finland
| | - Elmeri Rivasto
- grid.1374.10000 0001 2097 1371Wihuri Physical Laboratory, Department of Physics and Astronomy, University of Turku, 20014 Turku, Finland ,grid.1374.10000 0001 2097 1371University of Turku Graduate School (UTUGS), University of Turku, 20014 Turku, Finland
| | - Mukarram Zaman Khan
- grid.1374.10000 0001 2097 1371Wihuri Physical Laboratory, Department of Physics and Astronomy, University of Turku, 20014 Turku, Finland ,grid.1374.10000 0001 2097 1371University of Turku Graduate School (UTUGS), University of Turku, 20014 Turku, Finland
| | - Hannes Rijckaert
- grid.5342.00000 0001 2069 7798SCRiPTS, Department of Chemistry, Ghent University, Krijgslaan 281 S3, 9000 Ghent, Belgium
| | - Esko Salojärvi
- grid.1374.10000 0001 2097 1371Inorganic Materials Chemistry, Department of Chemistry, University of Turku, 20014 Turku, Finland
| | - Christopher Haalisto
- grid.1374.10000 0001 2097 1371Materials Research Laboratory, Department of Physics and Astronomy, University of Turku, 20014 Turku, Finland
| | - Ermei Mäkilä
- grid.1374.10000 0001 2097 1371Laboratory of Industrial Physics, Department of Physics and Astronomy, University of Turku, 20014 Turku, Finland
| | - Heikki Palonen
- grid.1374.10000 0001 2097 1371Wihuri Physical Laboratory, Department of Physics and Astronomy, University of Turku, 20014 Turku, Finland
| | - Hannu Huhtinen
- grid.1374.10000 0001 2097 1371Wihuri Physical Laboratory, Department of Physics and Astronomy, University of Turku, 20014 Turku, Finland
| | - Isabel Van Driessche
- grid.5342.00000 0001 2069 7798SCRiPTS, Department of Chemistry, Ghent University, Krijgslaan 281 S3, 9000 Ghent, Belgium
| | - Petriina Paturi
- grid.1374.10000 0001 2097 1371Wihuri Physical Laboratory, Department of Physics and Astronomy, University of Turku, 20014 Turku, Finland
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15
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Queraltó A, Banchewski J, Pacheco A, Gupta K, Saltarelli L, Garcia D, Alcalde N, Mocuta C, Ricart S, Pino F, Obradors X, Puig T. Combinatorial Screening of Cuprate Superconductors by Drop-On-Demand Inkjet Printing. ACS APPLIED MATERIALS & INTERFACES 2021; 13:9101-9112. [PMID: 33576610 PMCID: PMC7908015 DOI: 10.1021/acsami.0c18014] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/07/2020] [Accepted: 12/23/2020] [Indexed: 05/26/2023]
Abstract
Combinatorial and high-throughput experimentation (HTE) is achieving more relevance in material design, representing a turning point in the process of accelerated discovery, development, and optimization of materials based on data-driven approaches. The versatility of drop-on-demand inkjet printing (IJP) allows performing combinatorial studies through fabrication of compositionally graded materials with high spatial precision, here by mixing superconducting REBCO precursor solutions with different rare earth (RE) elements. The homogeneity of combinatorial Y1-xGdxBa2Cu3O7 samples was designed with computational methods and confirmed by energy-dispersive X-ray spectroscopy (EDX) and high-resolution X-ray diffraction (XRD). We reveal the advantages of this strategy in the optimization of the epitaxial growth of high-temperature REBCO superconducting films using the novel transient liquid-assisted growth method (TLAG). Advanced characterization methods, such as in situ synchrotron growth experiments, are tailored to suit the combinatorial approach and demonstrated to be essential for HTE schemes. The experimental strategy presented is key for the attainment of large datasets for the implementation of machine learning backed material design frameworks.
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Affiliation(s)
- Albert Queraltó
- Institut
de Ciència de Materials de Barcelona (ICMAB-CSIC), Campus UAB, 08193 Bellaterra, Catalonia, Spain
| | - Juri Banchewski
- Institut
de Ciència de Materials de Barcelona (ICMAB-CSIC), Campus UAB, 08193 Bellaterra, Catalonia, Spain
| | - Adrià Pacheco
- Institut
de Ciència de Materials de Barcelona (ICMAB-CSIC), Campus UAB, 08193 Bellaterra, Catalonia, Spain
| | - Kapil Gupta
- Institut
de Ciència de Materials de Barcelona (ICMAB-CSIC), Campus UAB, 08193 Bellaterra, Catalonia, Spain
| | - Lavinia Saltarelli
- Institut
de Ciència de Materials de Barcelona (ICMAB-CSIC), Campus UAB, 08193 Bellaterra, Catalonia, Spain
| | - Diana Garcia
- Institut
de Ciència de Materials de Barcelona (ICMAB-CSIC), Campus UAB, 08193 Bellaterra, Catalonia, Spain
| | - Núria Alcalde
- Institut
de Ciència de Materials de Barcelona (ICMAB-CSIC), Campus UAB, 08193 Bellaterra, Catalonia, Spain
| | - Cristian Mocuta
- Synchrotron
SOLEIL, L’Orme des Merisiers Saint-Aubin, BP 48, 91192 Gif-sur-Yvette, France
| | - Susagna Ricart
- Institut
de Ciència de Materials de Barcelona (ICMAB-CSIC), Campus UAB, 08193 Bellaterra, Catalonia, Spain
| | - Flavio Pino
- Institut
de Ciència de Materials de Barcelona (ICMAB-CSIC), Campus UAB, 08193 Bellaterra, Catalonia, Spain
| | - Xavier Obradors
- Institut
de Ciència de Materials de Barcelona (ICMAB-CSIC), Campus UAB, 08193 Bellaterra, Catalonia, Spain
| | - Teresa Puig
- Institut
de Ciència de Materials de Barcelona (ICMAB-CSIC), Campus UAB, 08193 Bellaterra, Catalonia, Spain
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16
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Low-Fluorine Ba-Deficient Solutions for High-Performance Superconducting YBCO Films. COATINGS 2021. [DOI: 10.3390/coatings11020199] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
High-performing superconducting YBa2Cu3O7–x (YBCO) films are fabricated by a chemical solution deposition methodology through novel barium-deficient low-fluorine solutions. The precursor solutions, distinguished for being straightforward, inexpensive and eco-friendly, allow us to reduce the growing temperature of YBCO down to 750 °C. We investigated the influence of the growing temperatures on both the microstructure and superconducting properties of YBCO films by using conventional thermal annealing and flash-heating approaches. A clear correlation between the growing temperature (Tg) and the superconducting performance of the films was obtained with improved performances observed at low Tg.
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17
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Lyu YY, Ma X, Xu J, Wang YL, Xiao ZL, Dong S, Janko B, Wang H, Divan R, Pearson JE, Wu P, Kwok WK. Reconfigurable Pinwheel Artificial-Spin-Ice and Superconductor Hybrid Device. NANO LETTERS 2020; 20:8933-8939. [PMID: 33252230 DOI: 10.1021/acs.nanolett.0c04093] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
The ability to control the potential landscape in a medium of interacting particles could lead to intriguing collective behavior and innovative functionalities. Here, we utilize spatially reconfigurable magnetic potentials of a pinwheel artificial-spin-ice (ASI) structure to tailor the motion of superconducting vortices. The reconstituted chain structures of the magnetic charges in the pinwheel ASI and the strong interaction between magnetic charges and superconducting vortices allow significant modification of the transport properties of the underlying superconducting thin film, resulting in a reprogrammable resistance state that enables a reversible and switchable vortex Hall effect. Our results highlight an effective and simple method of using ASI as an in situ reconfigurable nanoscale energy landscape to design reprogrammable superconducting electronics, which could also be applied to the in situ control of properties and functionalities in other magnetic particle systems, such as magnetic skyrmions.
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Affiliation(s)
- Yang-Yang Lyu
- Research Institute of Superconductor Electronics, School of Electronic Science and Engineering, Nanjing University, Nanjing 210023, China
- Materials Science Division, Argonne National Laboratory, Argonne, Illinois 60439, United States
| | - Xiaoyu Ma
- Department of Physics, University of Notre Dame, Notre Dame 46556, Indiana United States
| | - Jing Xu
- Center for Nanoscale Materials, Argonne National Laboratory, Argonne, Illinois 60439, United States
| | - Yong-Lei Wang
- Research Institute of Superconductor Electronics, School of Electronic Science and Engineering, Nanjing University, Nanjing 210023, China
| | - Zhi-Li Xiao
- Materials Science Division, Argonne National Laboratory, Argonne, Illinois 60439, United States
- Department of Physics, Northern Illinois University, DeKalb, Illinois 60115, United States
| | - Sining Dong
- Research Institute of Superconductor Electronics, School of Electronic Science and Engineering, Nanjing University, Nanjing 210023, China
| | - Boldizsar Janko
- Department of Physics, University of Notre Dame, Notre Dame 46556, Indiana United States
| | - Huabing Wang
- Research Institute of Superconductor Electronics, School of Electronic Science and Engineering, Nanjing University, Nanjing 210023, China
- Purple Mountain Laboratories, Nanjing 211111, China
| | - Ralu Divan
- Center for Nanoscale Materials, Argonne National Laboratory, Argonne, Illinois 60439, United States
| | - John E Pearson
- Materials Science Division, Argonne National Laboratory, Argonne, Illinois 60439, United States
| | - Peiheng Wu
- Research Institute of Superconductor Electronics, School of Electronic Science and Engineering, Nanjing University, Nanjing 210023, China
| | - Wai-Kwong Kwok
- Materials Science Division, Argonne National Laboratory, Argonne, Illinois 60439, United States
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18
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The Role of the Short Coherence Length in Unconventional Superconductors. CONDENSED MATTER 2020. [DOI: 10.3390/condmat5040077] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
A short coherence length is a distinctive feature of many cases of unconventional superconductivity. While in conventional superconductors, it is many orders of magnitude larger than the basic inter-particle distance, a short coherence length is common to superconductors as diverse as the cuprates, the picnites and granular superconductors. We dwell particularly on the last, because their simple chemical structure makes them a favorable material for exploring fundamental phenomena such as the Bardeen-Cooper Schrieffer (BCS)-to-Bose–Einstein condensation cross-over and the effect of the vicinity of a Mott metal-to-insulator transition.
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19
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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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20
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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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21
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Dynamic behavior of reversible oxygen migration in irradiated-annealed high temperature superconducting wires. Sci Rep 2020; 10:14848. [PMID: 32913237 PMCID: PMC7484753 DOI: 10.1038/s41598-020-70663-1] [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: 02/18/2020] [Accepted: 07/20/2020] [Indexed: 11/25/2022] Open
Abstract
We use atomically resolved scanning transmission electron microscopy and electron energy loss spectroscopy to determine the atomic-scale structural, chemical and electronic properties of artificial engineered defects in irradiated-annealed high temperature superconducting wires based on epitaxial Y(Dy)BCO film. We directly probe the oxygen vacancy defects in both plane and chain sites after irradiation with 18-meV Au ions. The plane site vacancies are reoccupied during post-annealing treatment. Our results demonstrate the dynamic reversible behavior of oxygen point defects, which explains the depression and recovery of self-field critical current and critical temperature in irradiation-annealing process. These findings reveal the strong effect of oxygen vacancies in different sites on the superconductivity properties of irradiated Y(Dy)BCO film, and provide important insights into defects engineering of 2G HTS coil wires.
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22
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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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23
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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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24
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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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25
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Lin Y, Choi EM, Lu P, Sun X, Wu R, Yun C, Zhu B, Wang H, Li W, Maity T, MacManus-Driscoll J. Vertical Strain-Driven Antiferromagnetic to Ferromagnetic Phase Transition in EuTiO 3 Nanocomposite Thin Films. ACS APPLIED MATERIALS & INTERFACES 2020; 12:8513-8521. [PMID: 31971773 DOI: 10.1021/acsami.9b17887] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Three-dimensional (3D) strain induced in self-assembled vertically aligned nanocomposite (VAN) epitaxial films provides an unrivaled method to induce very large strains in thin films. Here, by growing VAN films of EuTiO3 (ETO)-Eu2O3 (EO) with different EO fractions, the vertical strain was systematically increased in ETO, up to 3.15%, and the Eu-Ti-Eu bond angle along ⟨111⟩ decreased by up to 1°, leading to a weakening of the antiferromagnetic interactions and switching from antiferromagnetic to ferromagnetic behavior. Our work has shown for the first time that Eu-Ti-Eu superexchange interactions play a key role in determining the magnetic ground state of ETO. More broadly, our work serves as an exemplar to show that multifunctionalities in strong spin-lattice coupling perovskite oxides can be uniquely tuned at the atomic scale using simple VAN structures.
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Affiliation(s)
- Yisong Lin
- Department of Materials Science & Metallurgy , University of Cambridge , Cambridge CB3 0FS , United Kingdom
| | - Eun-Mi Choi
- Department of Materials Science & Metallurgy , University of Cambridge , Cambridge CB3 0FS , United Kingdom
| | - Ping Lu
- Sandia National Laboratories , Albuquerque , New Mexico 87185 , United States
| | - Xing Sun
- Materials Engineering , Purdue University , West Lafayette , Indiana 47907 , United States
| | - Rui Wu
- Department of Materials Science & Metallurgy , University of Cambridge , Cambridge CB3 0FS , United Kingdom
| | - Chao Yun
- Department of Materials Science & Metallurgy , University of Cambridge , Cambridge CB3 0FS , United Kingdom
| | - Bonan Zhu
- Department of Materials Science & Metallurgy , University of Cambridge , Cambridge CB3 0FS , United Kingdom
| | - Haiyan Wang
- Materials Engineering , Purdue University , West Lafayette , Indiana 47907 , United States
| | - Weiwei Li
- Department of Materials Science & Metallurgy , University of Cambridge , Cambridge CB3 0FS , United Kingdom
| | - Tuhin Maity
- Department of Materials Science & Metallurgy , University of Cambridge , Cambridge CB3 0FS , United Kingdom
| | - Judith MacManus-Driscoll
- Department of Materials Science & Metallurgy , University of Cambridge , Cambridge CB3 0FS , United Kingdom
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26
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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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Chen Y, Lei Y, Li Y, Yu Y, Cai J, Chiu MH, Rao R, Gu Y, Wang C, Choi W, Hu H, Wang C, Li Y, Song J, Zhang J, Qi B, Lin M, Zhang Z, Islam AE, Maruyama B, Dayeh S, Li LJ, Yang K, Lo YH, Xu S. Strain engineering and epitaxial stabilization of halide perovskites. Nature 2020; 577:209-215. [DOI: 10.1038/s41586-019-1868-x] [Citation(s) in RCA: 255] [Impact Index Per Article: 63.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2019] [Accepted: 11/19/2019] [Indexed: 12/23/2022]
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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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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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30
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Wang Y, Zhang W. Mapping the strain distribution within embedded nanoparticles via geometrical phase analysis. Micron 2019; 125:102715. [DOI: 10.1016/j.micron.2019.102715] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2019] [Revised: 07/12/2019] [Accepted: 07/13/2019] [Indexed: 11/16/2022]
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31
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Ivanov YP, Soltan S, Albrecht J, Goering E, Schütz G, Zhang Z, Chuvilin A. The Route to Supercurrent Transparent Ferromagnetic Barriers in Superconducting Matrix. ACS NANO 2019; 13:5655-5661. [PMID: 30977633 PMCID: PMC8830211 DOI: 10.1021/acsnano.9b00888] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 01/31/2019] [Accepted: 04/12/2019] [Indexed: 06/09/2023]
Abstract
A ferromagnetic barrier thinner than the coherence length in high-temperature superconductors is realized in the multilayers of YBa2Cu3O7-δ and La0.67Ca0.33MnO3. We used epitaxial growth of YBCO on ⟨110⟩ SrTiO3 substrates by pulsed laser deposition to prepare thin superconducting films with copper oxide planes oriented at an angle to the substrate surface. Subsequent deposition of LCMO and finally a second YBCO layer produces a superconductor/ferromagnet/superconductor trilayer containing an ultrathin ferromagnetic barrier with sophisticated geometry at which the long axis of coherence length ovoid of YBCO is pointing across the LCMO ferromagnetic layer. A detailed characterization of this structure is achieved using high-resolution electron microscopy.
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Affiliation(s)
- Yurii P. Ivanov
- Department
of Materials Science and Metallurgy, University
of Cambridge, Cambridge CB3 0FS, United Kingdom
- Erich
Schmid Institute of Materials Science, Austrian
Academy of Sciences, Jahnstraße 12, A-8700 Leoben, Austria
- School
of Natural Sciences, Far Eastern Federal
University, 690950 Vladivostok, Russia
| | - Soltan Soltan
- Department
of Physics, Faculty of Science, Helwan University, 11792 Cairo, Egypt
- Max-Planck-Institute
for Intelligent Systems, Heisenbergstr. 3, D-70569 Stuttgart, Germany
| | - Joachim Albrecht
- Research
Institute for Innovative Surfaces FINO, Beethovenstr. 1, D-73430 Aalen, Germany
| | - Eberhard Goering
- Max-Planck-Institute
for Intelligent Systems, Heisenbergstr. 3, D-70569 Stuttgart, Germany
| | - Gisela Schütz
- Max-Planck-Institute
for Intelligent Systems, Heisenbergstr. 3, D-70569 Stuttgart, Germany
| | - Zaoli Zhang
- Erich
Schmid Institute of Materials Science, Austrian
Academy of Sciences, Jahnstraße 12, A-8700 Leoben, Austria
| | - Andrey Chuvilin
- CIC
nanoGUNE Consolider, Av. de Tolosa 76, 20018 San Sebastian, Spain
- Basque
Foundation for Science, IKERBASQUE, Maria Diaz de Haro 3, 48013 Bilbao, Spain
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32
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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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33
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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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34
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Manzetti S, Trounev A. Supersymmetric Hamiltonian and Vortex Formation Model in a Quantum Nonlinear System in an Inhomogeneous Electromagnetic Field. ADVANCED THEORY AND SIMULATIONS 2019. [DOI: 10.1002/adts.201900011] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Sergio Manzetti
- Uppsala University, BMC, Dept Mol. Cell BiolBox 596 SE-75124 Uppsala Sweden
- Fjordforsk A/S6894 Vangsnes Norway
| | - Alexander Trounev
- Fjordforsk A/S6894 Vangsnes Norway
- A & E Trounev IT Consulting M4C 1T2 Toronto Canada
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35
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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] [Grants] [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-x Gd x Ba2Cu3O7-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 T c 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 J c 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.
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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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36
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Paek SM, Kim YI. Local structure and lattice covalency of complex perovskites BaM0.2Ta0.8O3−N (M = Li, Na, Mg) studied by X-ray diffraction and X-ray absorption spectroscopy. J SOLID STATE CHEM 2018. [DOI: 10.1016/j.jssc.2018.08.011] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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37
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Vallès F, Palau A, Rouco V, Mundet B, Obradors X, Puig T. Angular flux creep contributions in YBa 2Cu 3O 7-δ nanocomposites from electrical transport measurements. Sci Rep 2018; 8:5924. [PMID: 29651116 PMCID: PMC5897461 DOI: 10.1038/s41598-018-24392-1] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/02/2018] [Accepted: 03/23/2018] [Indexed: 11/14/2022] Open
Abstract
The shape of the electric-field—current-density (E-J) curve is determined by flux pinning and also by dynamics of vortices. Here, we propose a novel methodology to study the normalized flux creep rate S in YBa2Cu3O7−δ measured from E-J curves obtained by electrical transport measurements that provides a fast and versatile way to foresee the flux magnetic relaxation in films and disentangle angular flux creep contributions by the scaling of the isotropic contribution of S. After a detailed comparison of various pristine and nanocomposite films with differentiated nanostructures, we focus on the roles that intrinsic pinning and stacking faults (YBa2Cu4O8-intergrowths) play when the magnetic field is applied parallel to the superconducting CuO2 planes. This study reveals that the emerging intergrowths provide advanced pinning properties that additionally reduce the thermal activated flux magnetic relaxation. For this purpose, creep analysis becomes a very appropriate tool to elucidate the dominance of the different pinning sites at different regions of the magnetic-field—temperature diagram.
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Affiliation(s)
- F Vallès
- Institut de Ciència de Materials de Barcelona, ICMAB-CSIC, Campus UAB, 08193, Bellaterra, Spain.
| | - A Palau
- Institut de Ciència de Materials de Barcelona, ICMAB-CSIC, Campus UAB, 08193, Bellaterra, Spain
| | - V Rouco
- Institut de Ciència de Materials de Barcelona, ICMAB-CSIC, Campus UAB, 08193, Bellaterra, Spain
| | - B Mundet
- Institut de Ciència de Materials de Barcelona, ICMAB-CSIC, Campus UAB, 08193, Bellaterra, Spain
| | - X Obradors
- Institut de Ciència de Materials de Barcelona, ICMAB-CSIC, Campus UAB, 08193, Bellaterra, Spain
| | - T Puig
- Institut de Ciència de Materials de Barcelona, ICMAB-CSIC, Campus UAB, 08193, Bellaterra, Spain
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38
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Malmivirta M, Rijckaert H, Paasonen V, Huhtinen H, Hynninen T, Jha R, Awana VS, Van Driessche I, Paturi P. Enhanced flux pinning in YBCO multilayer films with BCO nanodots and segmented BZO nanorods. Sci Rep 2017; 7:14682. [PMID: 29089637 PMCID: PMC5665862 DOI: 10.1038/s41598-017-13758-6] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2017] [Accepted: 09/29/2017] [Indexed: 11/24/2022] Open
Abstract
The flux pinning properties of the high temperature superconductor YBa2Cu3O7−δ (YBCO) have been conventionally improved by creating both columnar and dot-like pinning centres into the YBCO matrix. To study the effects of differently doped multilayer structures on pinning, several samples consisting of a multiple number of individually BaZrO3 (BZO) and BaCeO3 (BCO) doped YBCO layers were fabricated. In the YBCO matrix, BZO forms columnar and BCO dot-like defects. The multilayer structure improves pinning capability throughout the whole angular range, giving rise to a high critical current density, Jc. However, the BZO doped monolayer reference still has the most isotropic Jc. Even though BZO forms nanorods, in this work the samples with multiple thin layers do not exhibit a c axis peak in the angular dependence of Jc. The angular dependencies and the approximately correct magnitude of Jc were also verified using a molecular dynamics simulation.
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Affiliation(s)
- Mika Malmivirta
- 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.
| | - Hannes Rijckaert
- SCRiPTS, Department of Inorganic and Physical Chemistry, Ghent University, Krijgslaan 281 S3, 9000, Ghent, Belgium
| | - Ville Paasonen
- 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
| | - Teemu Hynninen
- Wihuri Physical Laboratory, Department of Physics and Astronomy, University of Turku, FI-20014, Turku, Finland
| | - Rajveer Jha
- Superconductivity Division, National Physical Laboratory (CSIR), New Delhi, 110012, India
| | - Veerpal Singh Awana
- Superconductivity Division, National Physical Laboratory (CSIR), New Delhi, 110012, India
| | - Isabel Van Driessche
- SCRiPTS, Department of Inorganic and Physical 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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39
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Optimising multi-frame ADF-STEM for high-precision atomic-resolution strain mapping. Ultramicroscopy 2017; 179:57-62. [DOI: 10.1016/j.ultramic.2017.04.007] [Citation(s) in RCA: 38] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2016] [Revised: 04/05/2017] [Accepted: 04/14/2017] [Indexed: 11/20/2022]
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40
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Enhancing the oxygen ionic conductivity of (111) oriented Ce0.80Sm0.20O2-δ thin film through strain engineering. Electrochim Acta 2017. [DOI: 10.1016/j.electacta.2017.04.077] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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41
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McDannald A, Ye L, Cantoni C, Gollapudi S, Srinivasan G, Huey BD, Jain M. Switchable 3-0 magnetoelectric nanocomposite thin film with high coupling. NANOSCALE 2017; 9:3246-3251. [PMID: 28225123 DOI: 10.1039/c6nr08674h] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
A mixed precursor solution method was used to deposit 3-0 nanocomposite thin films of PbZr0.52Ti0.48O3 (PZT) and CoFe2O4 (CFO). The piezoelectric behavior of PZT and magnetostrictive behavior of CFO allow for magnetoelectric (ME) coupling through strain transfer between the respective phases. High ME coupling is desired for many applications including memory devices, magnetic field sensors, and energy harvesters. The spontaneous phase separation in the 3-0 nanocomposite film was observed, with 25 nm CFO particle or nanophases distributed in discrete layers through the thickness of the PZT matrix. Magnetic-force microscopy images of the nanocomposite thin film under opposite magnetic poling conditions revealed in-plane pancake-like regions of higher concentration of the CFO nanoparticles. The constraints on the size and distribution of the CFO nanoparticles created a unique distribution in a PZT matrix and achieved values of ME coupling of 3.07 V cm-1 Oe-1 at a DC bias of 250 Oe and 1 kHz, increasing up to 25.0 V cm-1 Oe-1 at 90 kHz. Piezo-force microscopy was used to investigate the ferroelectric domain structure before and after opposite magnetic poling directions. It was found that in this nanocomposite, the polarization of the ferroelectric domains switched direction as a result of switching the direction of the magnetization by magnetic fields.
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Affiliation(s)
- Austin McDannald
- Institute of Materials Science, University of Connecticut, 97 N Eagleville Rd, Storrs, CT 06269, USA
| | - Linghan Ye
- Institute of Materials Science, University of Connecticut, 97 N Eagleville Rd, Storrs, CT 06269, USA
| | - Claudia Cantoni
- Materials Science & Technology Division, Oak Ridge National Laboratory, 1 Bethel Valley Rd, Oak Ridge, TN 37831, USA
| | - Sreenivasulu Gollapudi
- Department of Physics, Oakland University, 2200 N. Squirrel Road, Rochester, MI 48309, USA
| | - Gopalan Srinivasan
- Department of Physics, Oakland University, 2200 N. Squirrel Road, Rochester, MI 48309, USA
| | - Bryan D Huey
- Institute of Materials Science, University of Connecticut, 97 N Eagleville Rd, Storrs, CT 06269, USA
| | - Menka Jain
- Institute of Materials Science, University of Connecticut, 97 N Eagleville Rd, Storrs, CT 06269, USA and Department of Physics, University of Connecticut, 97 N Eagleville Rd, Storrs, CT 06269, USA.
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42
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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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43
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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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44
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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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45
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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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46
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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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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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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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49
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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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50
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In situ stress observation in oxide films and how tensile stress influences oxygen ion conduction. Nat Commun 2016; 7:10692. [PMID: 26912416 PMCID: PMC4773421 DOI: 10.1038/ncomms10692] [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: 10/12/2015] [Accepted: 01/07/2016] [Indexed: 11/08/2022] Open
Abstract
Many properties of materials can be changed by varying the interatomic distances in the crystal lattice by applying stress. Ideal model systems for investigations are heteroepitaxial thin films where lattice distortions can be induced by the crystallographic mismatch with the substrate. Here we describe an in situ simultaneous diagnostic of growth mode and stress during pulsed laser deposition of oxide thin films. The stress state and evolution up to the relaxation onset are monitored during the growth of oxygen ion conducting Ce0.85Sm0.15O2-δ thin films via optical wafer curvature measurements. Increasing tensile stress lowers the activation energy for charge transport and a thorough characterization of stress and morphology allows quantifying this effect using samples with the conductive properties of single crystals. The combined in situ application of optical deflectometry and electron diffraction provides an invaluable tool for strain engineering in Materials Science to fabricate novel devices with intriguing functionalities.
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