Journal ArticleDOI
Synergetic combination of different types of defect to optimize pinning landscape using BaZrO 3 -doped YBa 2 Cu 3 O 7
Boris Maiorov,S. A. Baily,Honghui Zhou,Ozan Ugurlu,Ozan Ugurlu,J. A. Kennison,Paul Dowden,Terry G. Holesinger,S. R. Foltyn,Leonardo Civale +9 more
TLDR
The controlled combination of two effective pinning centres (randomly distributed nanoparticles and self-assembled columnar defects) is shown to be possible and effective and to produce thick films with remarkable Ic(H) and nearly isotropic angle dependence.Abstract:
Retaining a dissipation-free state while carrying large electrical currents is a challenge that needs to be solved to enable commercial applications of high-temperature superconductivity. Here, we show that the controlled combination of two effective pinning centres (randomly distributed nanoparticles and self-assembled columnar defects) is possible and effective. By simply changing the temperature or growth rate during pulsed-laser deposition of BaZrO(3)-doped YBa(2)Cu(3)O(7) films, we can vary the ratio of these defects, tuning the field and angular critical-current (Ic) performance to maximize Ic. We show that the defects' microstructure is governed by the growth kinetics and that the best results are obtained with a mixture of splayed columnar defects and random nanoparticles. The very high Ic arises from a complex vortex pinning landscape where columnar defects provide large pinning energy, while splay and nanoparticles inhibit flux creep. This knowledge is used to produce thick films with remarkable Ic(H) and nearly isotropic angle dependence.read more
Citations
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Coated conductors for power applications: materials challenges
Xavier Obradors,Teresa Puig +1 more
TL;DR: The scientific and technological scope where CCs have been raised as a complex technology product is summarized and it is shown that there exists still much room for performance improvement.
Journal ArticleDOI
Exploration of new superconductors and functional materials, and fabrication of superconducting tapes and wires of iron pnictides
Hideo Hosono,Keiichi Tanabe,Eiji Takayama-Muromachi,Hiroshi Kageyama,Shoji Yamanaka,Hiroaki Kumakura,Minoru Nohara,Hidenori Hiramatsu,Satoru Fujitsu +8 more
TL;DR: This review summarizes the major achievements of the project in newly found superconducting materials, and the fabrication wires and tapes of iron-based superconductors; it incorporates a list of ∼700 unsuccessful materials examined for superconductivity in the project.
Journal ArticleDOI
Artificial pinning center technology to enhance vortex pinning in YBCO coated conductors
Kaname Matsumoto,Paolo Mele +1 more
TL;DR: In this paper, artificial pinning centers (APCs) were successfully introduced into high-temperature superconductors (HTS) by nanotechnology, in order to strongly pin the quantized vortices.
Journal ArticleDOI
Self-Assembled Heteroepitaxial Oxide Nanocomposite Thin Film Structures: Designing Interface-Induced Functionality in Electronic Materials
TL;DR: In this paper, the self-assembly mechanisms of oxide nanocomposite films, as well as the advantageous functionalities that arise from such ordered structures, are explored, and a review of self-assembling/self-organizing systems is presented.
Journal ArticleDOI
Iron-based superconductors at high magnetic fields
TL;DR: An overview of the behavior of Fe-based superconductors in magnetic fields is given with the emphasis on the materials features important for pinning of vortices, critical current densities, melting of the vortex structures and the upper critical fields.
References
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Journal ArticleDOI
Strongly enhanced current densities in superconducting coated conductors of YBa2Cu3O7-x + BaZrO3
Judith L. MacManus-Driscoll,Judith L. MacManus-Driscoll,Stephen R. Foltyn,Quanxi Jia,Haiyan Wang,Adriana Serquis,Leonardo Civale,Boris Maiorov,Marilyn E. Hawley,M. P. Maley,Dean E. Peterson +10 more
TL;DR: This work demonstrates a simple and industrially scaleable route that yields a 1.5–5-fold improvement in the in-magnetic-field current densities of conductors that are already of high quality.
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Addition of nanoparticle dispersions to enhance flux pinning of the YBa2Cu3O7-x superconductor
TL;DR: A method for achieving a dispersion of ∼8-nm-sized nanoparticles in YBCO with a high number density, which increases the critical current by a factor of two to three for high magnetic fields.
Journal ArticleDOI
Materials science challenges for high-temperature superconducting wire
S. R. Foltyn,Leonardo Civale,Judith L. MacManus-Driscoll,Judith L. MacManus-Driscoll,Quanxi Jia,Boris Maiorov,Hsing-Lin Wang,M. P. Maley +7 more
TL;DR: The question is whether the advantages of superconducting wire, such as efficiency and compactness, can outweigh the disadvantage: cost.
Journal ArticleDOI
Boson localization and correlated pinning of superconducting vortex arrays.
TL;DR: A theory of vortex pinning in high-temperature superconductors by correlated disorder in the form of twin boundaries, grain boundaries, and columnar defects is described, and a scaling theory for the flux-liquid to Bose-glass transition, at which the linear resistivity vanishes is proposed.