Flux pinning characteristics of Smi+ x Ba 2-x Cu 3 O y films with the additional c-axis correlated pinning centers

Toshinori Ozaki, Yutaka Yoshida, Yusuke Ichino, Takahiro Harada, Yoshiaki Takai, Kaname Matsumoto, Ataru Ichinose, Shigeru Horii, Masashi Mukaida, Ryusuke Kita

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

It is known that columnar defects comprised of self-organized BaZrO 3 (BZO) nanorods within REBa 2 Cu 3 O y (REBCO) films are attractive as c-axis correlated pinning centers. On the other hand, we have fabricated high-J c Sm 1+x Ba 2-a Cu 3 O y (SmBCO) films including nanosized low-T c phases by using the low-temperature growth (LTG) technique. In this study, BZO nanorods were added to the LTG-SmBCO film for a further enhancement of the magnetic flux pinning. Additionally, we also deposited a conventional PLD-SmBCO film including BZO nanorods and discussed differences of the flux pinning properties and microstructures between LTG- and PLD-SmBCO films. In a cross-sectional transmission electron microscopy (TEM) image of the BZO doped PLD-SmBCO film, we could see the self-organized BZO nanorods were about 10 nm in diameter, extending along the c-axis of the film. In contrast, in the BZO doped LTG-SmBCO film, the high density BZO nanorods with smaller diameters tended to be short columns and tilted against the c-axis direction. These facts can be attributed to a suppression of the surface diffusion length of adatoms and/or an increase of nucleation frequency due to the low substrate temperature during the growth of the BZO doped LTG-SmBCO film. Furthermore, we concluded that differences of superconducting properties between the BZO doped PLD- and LTG-SmBCO films might be attributed to the difference in the number density of BZO nanorods which generated lattice strain around them.

Original languageEnglish
Article number4967842
Pages (from-to)3507-3510
Number of pages4
JournalIEEE Transactions on Applied Superconductivity
Volume19
Issue number3
DOIs
Publication statusPublished - Jun 1 2009

Fingerprint

Flux pinning
flux pinning
Growth temperature
Nanorods
Film growth
Pulsed laser deposition
nanorods
Adatoms
Surface diffusion
Magnetic flux
Nucleation
Transmission electron microscopy
Defects
surface diffusion
diffusion length
Microstructure
1-dodecylpyridoxal
adatoms
Substrates
magnetic flux

All Science Journal Classification (ASJC) codes

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

Cite this

Flux pinning characteristics of Smi+ x Ba 2-x Cu 3 O y films with the additional c-axis correlated pinning centers . / Ozaki, Toshinori; Yoshida, Yutaka; Ichino, Yusuke; Harada, Takahiro; Takai, Yoshiaki; Matsumoto, Kaname; Ichinose, Ataru; Horii, Shigeru; Mukaida, Masashi; Kita, Ryusuke.

In: IEEE Transactions on Applied Superconductivity, Vol. 19, No. 3, 4967842, 01.06.2009, p. 3507-3510.

Research output: Contribution to journalArticle

Ozaki, T, Yoshida, Y, Ichino, Y, Harada, T, Takai, Y, Matsumoto, K, Ichinose, A, Horii, S, Mukaida, M & Kita, R 2009, ' Flux pinning characteristics of Smi+ x Ba 2-x Cu 3 O y films with the additional c-axis correlated pinning centers ', IEEE Transactions on Applied Superconductivity, vol. 19, no. 3, 4967842, pp. 3507-3510. https://doi.org/10.1109/TASC.2009.2018456
Ozaki, Toshinori ; Yoshida, Yutaka ; Ichino, Yusuke ; Harada, Takahiro ; Takai, Yoshiaki ; Matsumoto, Kaname ; Ichinose, Ataru ; Horii, Shigeru ; Mukaida, Masashi ; Kita, Ryusuke. / Flux pinning characteristics of Smi+ x Ba 2-x Cu 3 O y films with the additional c-axis correlated pinning centers In: IEEE Transactions on Applied Superconductivity. 2009 ; Vol. 19, No. 3. pp. 3507-3510.
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