Effects of Fullerene Addition on Pinning Properties and Microstructures in Melt-textured Y-Ba-Cu-O Superconductors

Kazuo Inoue, Mikihito Tanichi, Muralidhar Miryala, Masato Murakami

Research output: Contribution to journalArticle

Abstract

Bulk Y-Ba-Cu-O superconductors have significant potential for engineering applications due to high critical current density (<formula><tex>$J_{c}$</tex></formula>) and high trapped magnetic fields, which is attributed to the presence of pinning centers such as micro-sized <formula><tex>${\rm Y_{2}BaCuO_{5}}$</tex></formula> (Y211) inclusions. The introduction of nano-sized particles is known to function as more effective pinning centers than micro-sized ones. It has been reported that <formula><tex>$J_{c}$</tex></formula> values were enhanced with the addition of nano-sized particles such as <formula><tex>${\rm ZrO_{2}}</tex></formula> and <formula><tex>${\rm Y_{2}Ba_{4}CuMO_{y}}$</tex></formula> (M = Nb, Zr, etc.) in the <formula><tex>${\rm YBa_{2}Cu_{3}O_{x}}$</tex></formula> (Y123) matrix. We have focused on nanocarbon as another candidate of the pinning center and reported that the addition of carbon nanotube (CNT) and nanodiamond led to the enhancement of <formula><tex>$J_{c}$</tex></formula> in Y-Ba-Cu-O superconductors. Fullerene (<formula><tex>${\rm C_{60}}$</tex></formula>) is also expected to improve the flux pinning performance. We then fabricated melt-processed Y-Ba-Cu-O bulk samples with the addition of fullerene and investigated the pinning properties and microstructures. SEM observation showed that nano-sized particles were distributed in the Y123 matrix. <formula><tex>$J_{c}$</tex></formula> exhibited the highest values for the sample with 1.0 wt% fullerene addition. These results suggest that fullerenes act as effective pinning centers.

Original languageEnglish
JournalIEEE Transactions on Applied Superconductivity
DOIs
Publication statusAccepted/In press - 2018 Jan 1

Fingerprint

Fullerenes
YBCO superconductors
Superconducting materials
fullerenes
microstructure
Microstructure
Nanodiamonds
Flux pinning
Carbon Nanotubes
trapped magnetic fields
flux pinning
Carbon nanotubes
matrices
Magnetic fields
critical current
Scanning electron microscopy
carbon nanotubes
engineering
inclusions
current density

Keywords

  • Critical current density
  • Fullerene
  • Fullerenes
  • Magnetic field measurement
  • Magnetic fields
  • Temperature measurement
  • Yttrium barium copper oxide
  • Yttrium barium copper oxide

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Electrical and Electronic Engineering

Cite this

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title = "Effects of Fullerene Addition on Pinning Properties and Microstructures in Melt-textured Y-Ba-Cu-O Superconductors",
abstract = "Bulk Y-Ba-Cu-O superconductors have significant potential for engineering applications due to high critical current density ($J_{c}$) and high trapped magnetic fields, which is attributed to the presence of pinning centers such as micro-sized ${\rm Y_{2}BaCuO_{5}}$ (Y211) inclusions. The introduction of nano-sized particles is known to function as more effective pinning centers than micro-sized ones. It has been reported that $J_{c}$ values were enhanced with the addition of nano-sized particles such as ${\rm ZrO_{2}} and ${\rm Y_{2}Ba_{4}CuMO_{y}}$ (M = Nb, Zr, etc.) in the ${\rm YBa_{2}Cu_{3}O_{x}}$ (Y123) matrix. We have focused on nanocarbon as another candidate of the pinning center and reported that the addition of carbon nanotube (CNT) and nanodiamond led to the enhancement of $J_{c}$ in Y-Ba-Cu-O superconductors. Fullerene (${\rm C_{60}}$) is also expected to improve the flux pinning performance. We then fabricated melt-processed Y-Ba-Cu-O bulk samples with the addition of fullerene and investigated the pinning properties and microstructures. SEM observation showed that nano-sized particles were distributed in the Y123 matrix. $J_{c}$ exhibited the highest values for the sample with 1.0 wt{\%} fullerene addition. These results suggest that fullerenes act as effective pinning centers.",
keywords = "Critical current density, Fullerene, Fullerenes, Magnetic field measurement, Magnetic fields, Temperature measurement, Yttrium barium copper oxide, Yttrium barium copper oxide",
author = "Kazuo Inoue and Mikihito Tanichi and Muralidhar Miryala and Masato Murakami",
year = "2018",
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AU - Inoue, Kazuo

AU - Tanichi, Mikihito

AU - Miryala, Muralidhar

AU - Murakami, Masato

PY - 2018/1/1

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AB - Bulk Y-Ba-Cu-O superconductors have significant potential for engineering applications due to high critical current density ($J_{c}$) and high trapped magnetic fields, which is attributed to the presence of pinning centers such as micro-sized ${\rm Y_{2}BaCuO_{5}}$ (Y211) inclusions. The introduction of nano-sized particles is known to function as more effective pinning centers than micro-sized ones. It has been reported that $J_{c}$ values were enhanced with the addition of nano-sized particles such as ${\rm ZrO_{2}} and ${\rm Y_{2}Ba_{4}CuMO_{y}}$ (M = Nb, Zr, etc.) in the ${\rm YBa_{2}Cu_{3}O_{x}}$ (Y123) matrix. We have focused on nanocarbon as another candidate of the pinning center and reported that the addition of carbon nanotube (CNT) and nanodiamond led to the enhancement of $J_{c}$ in Y-Ba-Cu-O superconductors. Fullerene (${\rm C_{60}}$) is also expected to improve the flux pinning performance. We then fabricated melt-processed Y-Ba-Cu-O bulk samples with the addition of fullerene and investigated the pinning properties and microstructures. SEM observation showed that nano-sized particles were distributed in the Y123 matrix. $J_{c}$ exhibited the highest values for the sample with 1.0 wt% fullerene addition. These results suggest that fullerenes act as effective pinning centers.

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