Critical current enhancement in PLD YBa2Cu3O7-x films using artificial pinning centers

Paolo Mele, K. Matsumoto, T. Horide, O. Miura, A. Ichinose, M. Mukaida, Y. Yoshida, S. Horii

Research output: Contribution to journalArticle

12 Citations (Scopus)

Abstract

We introduced high-density columnar defects as artificial pinning centers (APCs) for quantized vortices into YBa2Cu3O7-x (YBCO) films during the film deposition procedure. APCs were introduced perpendicular to the film surface using nano-sized Y2O3 islands prepared on SrTiO3(1 0 0) substrates. Varying the deposition parameters and the substrate annealing conditions allowed strong changes in the shape and density of the Y2O3 islands to be induced. Compared to a pure YBCO film, the best performance among the APCs samples was obtained on the Y2O3-deposited substrate with 5 laser pulses, corresponding to a nominal thickness of 0.2 nm. Even when the APC films were prepared using the same deposition conditions, the columnar defects enhanced Jc at 77 K from 1.8 to 2.7 MA/cm2 (self field) and from 0.06 to 0.10 MA/cm2 (H = 5 T, H∥c-axis).

Original languageEnglish
Pages (from-to)648-651
Number of pages4
JournalPhysica C: Superconductivity and its Applications
Volume445-448
Issue number1-2
DOIs
Publication statusPublished - 2006 Oct 1
Externally publishedYes

Fingerprint

Critical currents
Pulsed laser deposition
critical current
augmentation
Substrates
Defects
defects
Laser pulses
Vortex flow
1-dodecylpyridoxal
barium copper yttrium oxide
vortices
Annealing
annealing
pulses
lasers

Keywords

  • Artificial pinning center
  • J
  • Vortex pinning
  • YBCO

ASJC Scopus subject areas

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

Cite this

Critical current enhancement in PLD YBa2Cu3O7-x films using artificial pinning centers. / Mele, Paolo; Matsumoto, K.; Horide, T.; Miura, O.; Ichinose, A.; Mukaida, M.; Yoshida, Y.; Horii, S.

In: Physica C: Superconductivity and its Applications, Vol. 445-448, No. 1-2, 01.10.2006, p. 648-651.

Research output: Contribution to journalArticle

Mele, P, Matsumoto, K, Horide, T, Miura, O, Ichinose, A, Mukaida, M, Yoshida, Y & Horii, S 2006, 'Critical current enhancement in PLD YBa2Cu3O7-x films using artificial pinning centers', Physica C: Superconductivity and its Applications, vol. 445-448, no. 1-2, pp. 648-651. https://doi.org/10.1016/j.physc.2006.04.064
Mele, Paolo ; Matsumoto, K. ; Horide, T. ; Miura, O. ; Ichinose, A. ; Mukaida, M. ; Yoshida, Y. ; Horii, S. / Critical current enhancement in PLD YBa2Cu3O7-x films using artificial pinning centers. In: Physica C: Superconductivity and its Applications. 2006 ; Vol. 445-448, No. 1-2. pp. 648-651.
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