Magnetic nanoparticles as pinning center in Bi-Sr-Ca-Cu-O/Ag superconductor tapes

Roslan Abd. Shukor, S. Y. Yahya

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

This paper reports on the effectiveness of magnetic nanoparticles as pinning center in the Bi-based superconductor tapes. Nanosize γ-Fe 2O3 and ultrafine Fe3O4 have been employed to enhance the transport current density of Ag-sheathed-(Bi 1.6Pb0.4)Sr2Ca2Cu3O 10 superconductor tapes prepared by the powder-in-tube technique. The transport critical current density, Jc of (Bi1.6Pb 0.4)Sr2Ca2Cu3O10- (γ-Fe2O3)0.01, sintered at the optimum temperature of 845°C is 6490 A/cm2 when measured at 77 K. A further single intermediate rolling step increases Jc to 9560 A/cm2. Samples without γ-Fe2O3 prepared under the same condition showed a lower Jc with a maximum of 1560 A/cm2. Similar results are also obtained for ultrafine Fe 3O4. Magnetic impurities generally suppress superconductivity. However, our study shows great promise of magnetic nanorod γ-Fe2O3 and ultrafine Fe3O4 as novel pinning centers in enhancing the transport critical density of Ag sheathed Bi-Sr-Ca-Cu-O superconductor tapes. This is in line with previous calculations on frozen flux superconductor with magnetic nanoparticle as pinning centers.

Original languageEnglish
Title of host publicationMaterials Science Forum
Pages211-216
Number of pages6
Volume517
Publication statusPublished - 2006
EventInternational Conference on Functional Materials and Devices, ICFMD-2005 - Kuala Lumpur
Duration: 6 Jun 20058 Jun 2005

Publication series

NameMaterials Science Forum
Volume517
ISSN (Print)02555476

Other

OtherInternational Conference on Functional Materials and Devices, ICFMD-2005
CityKuala Lumpur
Period6/6/058/6/05

Fingerprint

Tapes
Superconducting materials
Nanoparticles
Superconductivity
Nanorods
Powders
Current density
Impurities
Fluxes
Ultrafine
Temperature

Keywords

  • Flux pinning
  • Magnetic particles
  • Superconductor tapes; transport critical current density

ASJC Scopus subject areas

  • Materials Science(all)

Cite this

Abd. Shukor, R., & Yahya, S. Y. (2006). Magnetic nanoparticles as pinning center in Bi-Sr-Ca-Cu-O/Ag superconductor tapes. In Materials Science Forum (Vol. 517, pp. 211-216). (Materials Science Forum; Vol. 517).

Magnetic nanoparticles as pinning center in Bi-Sr-Ca-Cu-O/Ag superconductor tapes. / Abd. Shukor, Roslan; Yahya, S. Y.

Materials Science Forum. Vol. 517 2006. p. 211-216 (Materials Science Forum; Vol. 517).

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abd. Shukor, R & Yahya, SY 2006, Magnetic nanoparticles as pinning center in Bi-Sr-Ca-Cu-O/Ag superconductor tapes. in Materials Science Forum. vol. 517, Materials Science Forum, vol. 517, pp. 211-216, International Conference on Functional Materials and Devices, ICFMD-2005, Kuala Lumpur, 6/6/05.
Abd. Shukor R, Yahya SY. Magnetic nanoparticles as pinning center in Bi-Sr-Ca-Cu-O/Ag superconductor tapes. In Materials Science Forum. Vol. 517. 2006. p. 211-216. (Materials Science Forum).
Abd. Shukor, Roslan ; Yahya, S. Y. / Magnetic nanoparticles as pinning center in Bi-Sr-Ca-Cu-O/Ag superconductor tapes. Materials Science Forum. Vol. 517 2006. pp. 211-216 (Materials Science Forum).
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