Enhancement of critical current density of YBCO films by introduction of artificial pinning centers due to the distributed nano-scaled Y2O3 islands on substrates

Matsumoto, Kaname; Horide, Tomoya; Osamura, Kōzō; Mukaida, Masashi; Yoshida, Yutaka; Ichinose, Ataru; Horii, Shigeru

doi:10.1016/j.physc.2004.01.157

Cited by 124 publications

(68 citation statements)

References 7 publications

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“…This approach has been pursued by various research groups in the last few years using different materials deposited in the form of nanoparticles on the substrate (Ir, Ag, Y 2 O 3 , ZrO 2 , MgO, BaZrO 3 ) or processing the oxide template so that it develops outgrowths of nanoscale size [31][32][33][34][35][36]. However, the pinning induced by the defects and strain fields stemming from the surface particles is generally of a random nature and does not provide the desirable enhancement of J c for H//c.…”

Section: Figure 6 Goes Herementioning

confidence: 99%

“…The YBCO growth is disturbed by the presence of the nanodots, and antiphase boundaries terminating in stacking faults are produced in the growing film. In two cases c-axis correlated defects with consequent significant J c enhancement for H//c were reported using Y 2 O 3 nanoparticles and nanometer sized SrTiO 3 outgrowths [34,37]. Nevertheless, an understanding of the correlation between nanoparticles or outgrowths and the type of defects they generate is lacking and similar nanostructures on the surface of the substrate…”

Section: Figure 6 Goes Herementioning

confidence: 99%

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Nanotechnologies to Enable High‐Performance Superconductors for Energy Applications

Cantoni

Goyal

2013

Nanotechnology for the Energy Challenge

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High Temperature Superconductors (HTS) wires or coated conductors (CC) hold promise to revolutionize the transmission of electricity enabling the present electric grid to meet the world's growing energy needs. Although superconducting wires can carry 150 times more power than copper wires of the same cross section, further performance improvements are necessary for the superconducting technology to become costcompetitive. This objective can be achieved by introducing and controlling nano-sized defects and non-superconducting phases within the superconducting film's matrix. Such nanostructures, when carefully engineered, significantly increase the loss-free current sustained by the superconductor through a mechanism known as flux pinning. This chapter is a review of the various types of nanostructures that are artificially introduced in superconducting films to enhance the superconductor's performance. Different approaches, materials, and techniques are discussed and the most recent results in this field compared. The last section of this chapter discusses an additional example of 2 nanotechnology employment in superconducting wires. This nanotechnology can be regarded as an atomic surface treatment designed to enable the right crystallographic orientation of the superconducting film deposited on the metal template. Overcoming limitations to superconductors' performanceEfficient transport and storage of energy are two key factors in the formidable quest to meet the world's growing energy needs. Because electricity is the energy form of choice for most uses, and the most effective way to transport energy from and to different locations, addressing the energy problem means necessarily addressing the shortcomings of the present electric power grid. Capacity and reliability of the present grid are entirely inadequate to accommodate an expected growth in energy demand of 50% by the year 2030, most of which will be concentrated in urbanized areas whose infrastructures are already severely congested. In addition, 7 -10 % of the electricity generated is lost in the grid by heat dissipation, and transmission limitations have already caused black outs throughout the world. Superconducting cables made with high critical temperature (T c ) cuprate superconductors have the potential to transform the grid to meet the 21 st century demands. Such cables can carry five times more power then copper cables with the same cross section and exhibit considerable lower losses (loss-free dc transmission). Because lower losses enable longer transmission lengths, superconductors provide the best choice for building a new, non-fragmented, super grid that will enable massive long-distance power transmission, interconnect entire continents, and provide widespread, local energy storage. In such a grid, renewable source power plants in the most remote areas can deliver power anywhere in the continent according to real time demands, and episodic 3 surpluses are readily stored for future use. High temperature superconducting (HTS) cabl...

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Section: Figure 6 Goes Herementioning

confidence: 99%

Section: Figure 6 Goes Herementioning

confidence: 99%

Nanotechnologies to Enable High‐Performance Superconductors for Energy Applications

Cantoni

Goyal

2013

Nanotechnology for the Energy Challenge

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“…8,9 The third approach for introducing nanostructured APCs into YBCO thin films is decoration of substrates with a large number of second-phase nanoislands before the deposition of YBCO thin films. By controlling the number of laser pulses and other deposition parameters, Y 2 O 3 , 3,7,13,20 Ag, 18,19 and LaNiO 3 21 nanoislands have been successfully fabricated on SrTiO 3 (STO) and LaAlO 3 (LAO) substrates prior to the deposition of YBCO thin films, and strong pinning properties have been obtained.…”

Section: Introductionmentioning

confidence: 99%

Preparation and Flux-Pinning Properties of Multilayered Yttrium Barium Copper Oxide Thin Films Containing Alternating Barium Zirconate and Yttria Nanostructures

Liu

2011

Journal of Elec Materi

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Multilayered yttrium barium copper oxide (YBCO) thin films grown by the pulsed laser deposition technique provide the possibility for independently tailoring the nanoscale artificial pinning centers embedded in individual layers. This enables engineering of artificial pinning centers in YBCO thin films for optimizing their flux-pinning properties. In this work, we combined barium zirconate (BaZrO 3 ) and yttria (Y 2 O 3 ) nanostructures into multilayered YBCO thin films by alternating ablation of YBCO + BaZrO 3 and YBCO + Y 2 O 3 composite targets. The layers containing BaZrO 3 nanostructures have a different thickness from those containing Y 2 O 3 nanostructures. A highly epitaxial multilayered YBCO thin film, comprising five alternating layers of YBCO + BaZrO 3 and YBCO + Y 2 O 3 , has been prepared on a lanthanum aluminate (LaAlO 3 ) (100) substrate. This multilayered YBCO thin film exhibited strong flux-pinning properties. This work provides a preliminary step towards engineering of artificial pinning centers in YBCO thin films.

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“…To improve J c in high magnetic fields, it is efficient to introduce artificial pinning center (APC). For example, dislocations introduced by Y 2 O 3 nanoparticles on a substrate surface [4] and nanorods introduced by BaZrO 3 (BZO) [5,6] and BaSnO 3 (BSO) [7] into the film have been employed as effective pinning centers.…”

Section: Introductionmentioning

confidence: 99%

Jc anisotropy for magnetic field angle in YBCO coated conductor on IBAD-MgO buffered metal tapes

Suzuki

Yoshida

Takai

et al. 2010

Physica C: Superconductivity and its Applications

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Enhancement of critical current density of YBCO films by introduction of artificial pinning centers due to the distributed nano-scaled Y2O3 islands on substrates

Cited by 124 publications

References 7 publications

Nanotechnologies to Enable High‐Performance Superconductors for Energy Applications

Nanotechnologies to Enable High‐Performance Superconductors for Energy Applications

Preparation and Flux-Pinning Properties of Multilayered Yttrium Barium Copper Oxide Thin Films Containing Alternating Barium Zirconate and Yttria Nanostructures

Jc anisotropy for magnetic field angle in YBCO coated conductor on IBAD-MgO buffered metal tapes

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