### Abstract

The effect of nanosized CoFe<inf>2</inf>O<inf>4</inf> (60 nm) addition on the transport critical current density, J<inf>c</inf>, of (Bi<inf>1.6</inf>Pb<inf>0.4</inf>)Sr<inf>2</inf>Ca<inf>2</inf>Cu<inf>3</inf>O<inf>10</inf>(CoFe<inf>2</inf>O<inf>4</inf>)<inf>x</inf> (x = 0–0.05 wt%) superconductor prepared by the co-precipitation method was investigated. The optimal J<inf>c</inf> (measured using the four-point probe method) was observed in the x = 0.01 wt% pellets. Using this optimal wt%, Ag-sheathed (Bi<inf>1.6</inf>Pb<inf>0.4</inf>)Sr<inf>2</inf>Ca<inf>2</inf>Cu3O<inf>10</inf>(CoFe<inf>2</inf>O<inf>4</inf>)<inf>0.01</inf> superconductor tapes were fabricated using the powder-in-tube method. The tapes were sintered for 50 and 100 h at 845 °C. The phase and microstructure of the samples were determined using the powder X-ray diffraction method and scanning electron microscopy, respectively. The temperature dependence of J<inf>c</inf> for the tapes in various applied magnetic fields was also measured. J<inf>c</inf> of (Bi<inf>1.6</inf>Pb<inf>0.4</inf>)Sr<inf>2</inf>Ca<inf>2</inf>Cu<inf>3</inf>O<inf>10</inf>(CoFe<inf>2</inf>O<inf>4</inf>)<inf>0.01</inf>/Ag tapes sintered for 100 h was 22,420 A/cm<sup>2</sup> at 30 K. The non-added tapes sintered for 100 h showed a much lower J<inf>c</inf> (8280 A/cm<sup>2</sup> at 30 K). This study showed that addition of CoFe<inf>2</inf>O<inf>4</inf> nanoparticles enhanced the transport critical current density in the (Bi<inf>1.6</inf>Pb<inf>0.4</inf>)Sr<inf>2</inf>Ca<inf>2</inf>Cu<inf>3</inf>O<inf>10</inf> superconductor tapes. This result is consistent with the previous calculations on frozen flux superconductor in a nanomagnet–superconductor hybrid system.

Original language | English |
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Pages (from-to) | 1573-1578 |

Number of pages | 6 |

Journal | Applied Physics A: Materials Science and Processing |

Volume | 120 |

Issue number | 4 |

DOIs | |

Publication status | Published - 17 Jul 2015 |

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### ASJC Scopus subject areas

- Materials Science(all)
- Chemistry(all)

### Cite this

*Applied Physics A: Materials Science and Processing*,

*120*(4), 1573-1578. https://doi.org/10.1007/s00339-015-9357-z

**Transport critical current density of (Bi<inf>1.6</inf>Pb<inf>0.4</inf>)Sr<inf>2</inf>Ca<inf>2</inf>Cu<inf>3</inf>O<inf>10</inf>/Ag superconductor tapes with addition of nanosized CoFe<inf>2</inf>O<inf>4</inf> .** / Hafiz, M.; Abd. Shukor, Roslan.

Research output: Contribution to journal › Article

*Applied Physics A: Materials Science and Processing*, vol. 120, no. 4, pp. 1573-1578. https://doi.org/10.1007/s00339-015-9357-z

}

TY - JOUR

T1 - Transport critical current density of (Bi1.6Pb0.4)Sr2Ca2Cu3O10/Ag superconductor tapes with addition of nanosized CoFe2O4

AU - Hafiz, M.

AU - Abd. Shukor, Roslan

PY - 2015/7/17

Y1 - 2015/7/17

N2 - The effect of nanosized CoFe2O4 (60 nm) addition on the transport critical current density, Jc, of (Bi1.6Pb0.4)Sr2Ca2Cu3O10(CoFe2O4)x (x = 0–0.05 wt%) superconductor prepared by the co-precipitation method was investigated. The optimal Jc (measured using the four-point probe method) was observed in the x = 0.01 wt% pellets. Using this optimal wt%, Ag-sheathed (Bi1.6Pb0.4)Sr2Ca2Cu3O10(CoFe2O4)0.01 superconductor tapes were fabricated using the powder-in-tube method. The tapes were sintered for 50 and 100 h at 845 °C. The phase and microstructure of the samples were determined using the powder X-ray diffraction method and scanning electron microscopy, respectively. The temperature dependence of Jc for the tapes in various applied magnetic fields was also measured. Jc of (Bi1.6Pb0.4)Sr2Ca2Cu3O10(CoFe2O4)0.01/Ag tapes sintered for 100 h was 22,420 A/cm2 at 30 K. The non-added tapes sintered for 100 h showed a much lower Jc (8280 A/cm2 at 30 K). This study showed that addition of CoFe2O4 nanoparticles enhanced the transport critical current density in the (Bi1.6Pb0.4)Sr2Ca2Cu3O10 superconductor tapes. This result is consistent with the previous calculations on frozen flux superconductor in a nanomagnet–superconductor hybrid system.

AB - The effect of nanosized CoFe2O4 (60 nm) addition on the transport critical current density, Jc, of (Bi1.6Pb0.4)Sr2Ca2Cu3O10(CoFe2O4)x (x = 0–0.05 wt%) superconductor prepared by the co-precipitation method was investigated. The optimal Jc (measured using the four-point probe method) was observed in the x = 0.01 wt% pellets. Using this optimal wt%, Ag-sheathed (Bi1.6Pb0.4)Sr2Ca2Cu3O10(CoFe2O4)0.01 superconductor tapes were fabricated using the powder-in-tube method. The tapes were sintered for 50 and 100 h at 845 °C. The phase and microstructure of the samples were determined using the powder X-ray diffraction method and scanning electron microscopy, respectively. The temperature dependence of Jc for the tapes in various applied magnetic fields was also measured. Jc of (Bi1.6Pb0.4)Sr2Ca2Cu3O10(CoFe2O4)0.01/Ag tapes sintered for 100 h was 22,420 A/cm2 at 30 K. The non-added tapes sintered for 100 h showed a much lower Jc (8280 A/cm2 at 30 K). This study showed that addition of CoFe2O4 nanoparticles enhanced the transport critical current density in the (Bi1.6Pb0.4)Sr2Ca2Cu3O10 superconductor tapes. This result is consistent with the previous calculations on frozen flux superconductor in a nanomagnet–superconductor hybrid system.

UR - http://www.scopus.com/inward/record.url?scp=84939258549&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84939258549&partnerID=8YFLogxK

U2 - 10.1007/s00339-015-9357-z

DO - 10.1007/s00339-015-9357-z

M3 - Article

AN - SCOPUS:84939258549

VL - 120

SP - 1573

EP - 1578

JO - Applied Physics

JF - Applied Physics

SN - 0340-3793

IS - 4

ER -