Effect of annealing DC-sputtered Bi,Pb-2223 thin films

A. Matsumoto, H. Kitaguchi, T. Doi, T. Izumi, Y. Hakuraku, Y. Shimada, S. Hata

Research output: Contribution to journalArticle

Abstract

Thin films of Bi-2223 fabricated on SrTiO3(100) substrates by dc sputtering were found to have a transition temperature (Tc) as low as that of bulk-phase Bi-2223. Subsequent annealing of these precursor films in the presence of Bi,Pb-2223 pellets increased this Tc value from 72 to 105 K, making it comparable to bulk-phase Bi,Pb-2223. Strong (00l) peaks and a sharp quadrupole were observed in this annealed film, indicating a main phase of Bi,Pb-2223 with a c-axis orientation by the X-ray diffractometry (XRD) measurements. A maximum critical current density (Jc) of 3.3 × 105 A/cm2 at 77 K was also obtained with the Bi,Pb-2223 thin film, which is a value that is much higher than that of commercial Bi,Pb-2223 tapes. Jc values of thin films were strongly dependent on the annealing temperatures between 854 °C and 866 °C. In this temperature range, XRD data show that the thin films were not a single phase of Bi,Pb-2223, suggesting only a slight interruption of the supercurrent. Although, the films have a good c-axis and ab-axis alignments. Thus, although the films were not perfect, the improvement in microstructure allows for a much higher Jc value.

Original languageEnglish
Article number6967731
JournalIEEE Transactions on Applied Superconductivity
Volume25
Issue number3
DOIs
Publication statusPublished - Jun 1 2015

Fingerprint

direct current
Annealing
Thin films
annealing
thin films
X ray diffraction analysis
interruption
pellets
Tapes
tapes
Superconducting transition temperature
Sputtering
critical current
x rays
quadrupoles
sputtering
transition temperature
alignment
current density
Temperature

All Science Journal Classification (ASJC) codes

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

Cite this

Matsumoto, A., Kitaguchi, H., Doi, T., Izumi, T., Hakuraku, Y., Shimada, Y., & Hata, S. (2015). Effect of annealing DC-sputtered Bi,Pb-2223 thin films. IEEE Transactions on Applied Superconductivity, 25(3), [6967731]. https://doi.org/10.1109/TASC.2014.2376193

Effect of annealing DC-sputtered Bi,Pb-2223 thin films. / Matsumoto, A.; Kitaguchi, H.; Doi, T.; Izumi, T.; Hakuraku, Y.; Shimada, Y.; Hata, S.

In: IEEE Transactions on Applied Superconductivity, Vol. 25, No. 3, 6967731, 01.06.2015.

Research output: Contribution to journalArticle

Matsumoto, A, Kitaguchi, H, Doi, T, Izumi, T, Hakuraku, Y, Shimada, Y & Hata, S 2015, 'Effect of annealing DC-sputtered Bi,Pb-2223 thin films', IEEE Transactions on Applied Superconductivity, vol. 25, no. 3, 6967731. https://doi.org/10.1109/TASC.2014.2376193
Matsumoto A, Kitaguchi H, Doi T, Izumi T, Hakuraku Y, Shimada Y et al. Effect of annealing DC-sputtered Bi,Pb-2223 thin films. IEEE Transactions on Applied Superconductivity. 2015 Jun 1;25(3). 6967731. https://doi.org/10.1109/TASC.2014.2376193
Matsumoto, A. ; Kitaguchi, H. ; Doi, T. ; Izumi, T. ; Hakuraku, Y. ; Shimada, Y. ; Hata, S. / Effect of annealing DC-sputtered Bi,Pb-2223 thin films. In: IEEE Transactions on Applied Superconductivity. 2015 ; Vol. 25, No. 3.
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