# 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

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}$</tex></formula> exhibited the highest values for the sample with 1.0 wt% fullerene addition. These results suggest that fullerenes act as effective pinning centers. Original language English IEEE Transactions on Applied Superconductivity https://doi.org/10.1109/TASC.2018.2872815 Accepted/In press - 2018 Jan 1 ### Fingerprint Fullerenes YBCO superconductors Superconducting materials fullerenes microstructure Microstructure Nanodiamonds Flux pinning Carbon Nanotubes trapped magnetic fields flux pinning Carbon nanotubes matrices Magnetic fields critical current Scanning electron microscopy carbon nanotubes engineering inclusions current density ### Keywords • Critical current density • Fullerene • Fullerenes • Magnetic field measurement • Magnetic fields • Temperature measurement • Yttrium barium copper oxide • Yttrium barium copper oxide ### ASJC Scopus subject areas • Electronic, Optical and Magnetic Materials • Condensed Matter Physics • Electrical and Electronic Engineering ### Cite this In: IEEE Transactions on Applied Superconductivity, 01.01.2018. Research output: Contribution to journalArticle @article{daa0a8adfe9d49e58d7179be6dbc027d, title = "Effects of Fullerene Addition on Pinning Properties and Microstructures in Melt-textured Y-Ba-Cu-O Superconductors", abstract = "Bulk Y-Ba-Cu-O superconductors have significant potential for engineering applications due to high critical current density ($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",
month = "1",
day = "1",
doi = "10.1109/TASC.2018.2872815",
language = "English",
journal = "IEEE Transactions on Applied Superconductivity",
issn = "1051-8223",
publisher = "Institute of Electrical and Electronics Engineers Inc.",

}

TY - JOUR

T1 - Effects of Fullerene Addition on Pinning Properties and Microstructures in Melt-textured Y-Ba-Cu-O Superconductors

AU - Inoue, Kazuo

AU - Tanichi, Mikihito

AU - Miryala, Muralidhar

AU - Murakami, Masato

PY - 2018/1/1

Y1 - 2018/1/1

N2 - 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}$exhibited the highest values for the sample with 1.0 wt% fullerene addition. These results suggest that fullerenes act as effective pinning centers. AB - Bulk Y-Ba-Cu-O superconductors have significant potential for engineering applications due to high critical current density ($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.

KW - Critical current density

KW - Fullerene

KW - Fullerenes

KW - Magnetic field measurement

KW - Magnetic fields

KW - Temperature measurement

KW - Yttrium barium copper oxide

KW - Yttrium barium copper oxide

UR - http://www.scopus.com/inward/record.url?scp=85054412134&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=85054412134&partnerID=8YFLogxK

U2 - 10.1109/TASC.2018.2872815

DO - 10.1109/TASC.2018.2872815

M3 - Article

AN - SCOPUS:85054412134

JO - IEEE Transactions on Applied Superconductivity

JF - IEEE Transactions on Applied Superconductivity

SN - 1051-8223

ER -