### Abstract

We report the effect of NiF<inf>2</inf> (10 nm) additions 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>/Ag sheathed superconductor tapes. Pellets 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>(NiF<inf>2</inf>)<inf>χ</inf> (χ = 0-0.05 wt.%) superconductor were prepared using the acetate coprecipitation method. The sample with 0.04 wt.% addition of NiF<inf>2</inf> exhibited the highest J<inf>c</inf>. Ag-sheathed (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>(NiF<inf>2</inf>)<inf>0.04</inf> superconductor tapes were fabricated using the powder-in-tube (PIT) method and sintered at 845°C for 50 and 100h. J<inf>c</inf> of nonadded tapes at 30K sintered for 50 and 100h was 6370 and 8280A/cm<sup>2</sup>, respectively. 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>(NiF<inf>2</inf>)<inf>0.04</inf>/Ag tape at 30K sintered for 50 and 100 h was 14390 and 17270 A/cm<sup>2</sup>, respectively. In magnetic fields (0 to 0.7 T), J<inf>c</inf> of the NiF<inf>2</inf> added tapes was also higher compared with the nonadded tape indicating that NiF<inf>2</inf> nanoparticles can act as effective flux pinning centers and longer sintering time improved the microstructure.Asteeper increase in J<inf>c</inf> was observed below 60K in the NiF<inf>2</inf> added tapes which coincided with the Neel temperature, T<inf>N</inf> of nanosized NiF<inf>2</inf> (60K). The pronounced enhancement of J<inf>c</inf> was attributed to the strong interaction between flux line network and the antiferromagnetic NiF<inf>2</inf> below T<inf>N</inf>.

Original language | English |
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Article number | 146476 |

Journal | Advances in Materials Science and Engineering |

Volume | 2015 |

DOIs | |

Publication status | Published - 2015 |

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### ASJC Scopus subject areas

- Materials Science(all)
- Engineering(all)

### Cite this

*Advances in Materials Science and Engineering*,

*2015*, [146476]. https://doi.org/10.1155/2015/146476

**Effect of nanosized NiF<inf>2</inf> addition on the transport critical current density of Ag-sheathed (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.** / Hafiz, M.; Abd. Shukor, Roslan.

Research output: Contribution to journal › Article

*Advances in Materials Science and Engineering*, vol. 2015, 146476. https://doi.org/10.1155/2015/146476

}

TY - JOUR

T1 - Effect of nanosized NiF2 addition on the transport critical current density of Ag-sheathed (Bi1.6Pb0.4)Sr2Ca2Cu3O10 superconductor tapes

AU - Hafiz, M.

AU - Abd. Shukor, Roslan

PY - 2015

Y1 - 2015

N2 - We report the effect of NiF2 (10 nm) additions on the transport critical current density, Jc of (Bi1.6Pb0.4)Sr2Ca2Cu3O10/Ag sheathed superconductor tapes. Pellets of (Bi1.6Pb0.4)Sr2Ca2Cu3O10(NiF2)χ (χ = 0-0.05 wt.%) superconductor were prepared using the acetate coprecipitation method. The sample with 0.04 wt.% addition of NiF2 exhibited the highest Jc. Ag-sheathed (Bi1.6Pb0.4)Sr2Ca2Cu3O10(NiF2)0.04 superconductor tapes were fabricated using the powder-in-tube (PIT) method and sintered at 845°C for 50 and 100h. Jc of nonadded tapes at 30K sintered for 50 and 100h was 6370 and 8280A/cm2, respectively. Jc of (Bi1.6Pb0.4)Sr2Ca2Cu3O10(NiF2)0.04/Ag tape at 30K sintered for 50 and 100 h was 14390 and 17270 A/cm2, respectively. In magnetic fields (0 to 0.7 T), Jc of the NiF2 added tapes was also higher compared with the nonadded tape indicating that NiF2 nanoparticles can act as effective flux pinning centers and longer sintering time improved the microstructure.Asteeper increase in Jc was observed below 60K in the NiF2 added tapes which coincided with the Neel temperature, TN of nanosized NiF2 (60K). The pronounced enhancement of Jc was attributed to the strong interaction between flux line network and the antiferromagnetic NiF2 below TN.

AB - We report the effect of NiF2 (10 nm) additions on the transport critical current density, Jc of (Bi1.6Pb0.4)Sr2Ca2Cu3O10/Ag sheathed superconductor tapes. Pellets of (Bi1.6Pb0.4)Sr2Ca2Cu3O10(NiF2)χ (χ = 0-0.05 wt.%) superconductor were prepared using the acetate coprecipitation method. The sample with 0.04 wt.% addition of NiF2 exhibited the highest Jc. Ag-sheathed (Bi1.6Pb0.4)Sr2Ca2Cu3O10(NiF2)0.04 superconductor tapes were fabricated using the powder-in-tube (PIT) method and sintered at 845°C for 50 and 100h. Jc of nonadded tapes at 30K sintered for 50 and 100h was 6370 and 8280A/cm2, respectively. Jc of (Bi1.6Pb0.4)Sr2Ca2Cu3O10(NiF2)0.04/Ag tape at 30K sintered for 50 and 100 h was 14390 and 17270 A/cm2, respectively. In magnetic fields (0 to 0.7 T), Jc of the NiF2 added tapes was also higher compared with the nonadded tape indicating that NiF2 nanoparticles can act as effective flux pinning centers and longer sintering time improved the microstructure.Asteeper increase in Jc was observed below 60K in the NiF2 added tapes which coincided with the Neel temperature, TN of nanosized NiF2 (60K). The pronounced enhancement of Jc was attributed to the strong interaction between flux line network and the antiferromagnetic NiF2 below TN.

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U2 - 10.1155/2015/146476

DO - 10.1155/2015/146476

M3 - Article

VL - 2015

JO - Advances in Materials Science and Engineering

JF - Advances in Materials Science and Engineering

SN - 1687-8434

M1 - 146476

ER -