Characteristics of high-performance BaHfO3-doped SmBa2Cu3Oy superconducting films fabricated with a seed layer and low-temperature growth

S. Miura, Y. Yoshida, Y. Ichino, K. Matsumoto, A. Ichinose, S. Awaji

Research output: Contribution to journalArticle

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Abstract

BaHfO3(BHO)-doped SmBa2Cu3Oy (SmBCO) superconducting films were fabricated with a seed layer and low-temperature growth (LTG technique) via pulsed laser deposition. The LTG technique enables the fabrication of high-quality SmBCO films even at a low substrate temperature during the deposition, and also greatly increases the number density of BHO nano-rods. Transmission electron microscopy observations showed that the 5.6 vol% BHO-doped sample had a high number density [(4.8 ± 0.3) × 103 μm-2] of small (5.4 ± 0.7 nm) BHO nano-rods. This sample exhibits maximum flux pinning forces (Fp) of 405 GN m-3 in 9.0 T at 40 K and 105 GN m-3 in 9.0 T at 65 K. The high density and small size of the nano-rods in a REBa2Cu3Oy matrix (where RE is a rare earth element) is considered to be very effective for enhancing Fp at low temperatures under a high field.

Original languageEnglish
Article number065013
JournalSuperconductor Science and Technology
Volume28
Issue number6
DOIs
Publication statusPublished - Jun 1 2015
Externally publishedYes

Fingerprint

Flux pinning
Superconducting films
Growth temperature
superconducting films
Seed
seeds
rods
flux pinning
Pulsed laser deposition
Rare earth elements
Transmission electron microscopy
Fabrication
Temperature
pulsed laser deposition
Substrates
rare earth elements
transmission electron microscopy
fabrication
matrices
temperature

All Science Journal Classification (ASJC) codes

  • Ceramics and Composites
  • Condensed Matter Physics
  • Metals and Alloys
  • Electrical and Electronic Engineering
  • Materials Chemistry

Cite this

Characteristics of high-performance BaHfO3-doped SmBa2Cu3Oy superconducting films fabricated with a seed layer and low-temperature growth. / Miura, S.; Yoshida, Y.; Ichino, Y.; Matsumoto, K.; Ichinose, A.; Awaji, S.

In: Superconductor Science and Technology, Vol. 28, No. 6, 065013, 01.06.2015.

Research output: Contribution to journalArticle

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AU - Ichinose, A.

AU - Awaji, S.

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AB - BaHfO3(BHO)-doped SmBa2Cu3Oy (SmBCO) superconducting films were fabricated with a seed layer and low-temperature growth (LTG technique) via pulsed laser deposition. The LTG technique enables the fabrication of high-quality SmBCO films even at a low substrate temperature during the deposition, and also greatly increases the number density of BHO nano-rods. Transmission electron microscopy observations showed that the 5.6 vol% BHO-doped sample had a high number density [(4.8 ± 0.3) × 103 μm-2] of small (5.4 ± 0.7 nm) BHO nano-rods. This sample exhibits maximum flux pinning forces (Fp) of 405 GN m-3 in 9.0 T at 40 K and 105 GN m-3 in 9.0 T at 65 K. The high density and small size of the nano-rods in a REBa2Cu3Oy matrix (where RE is a rare earth element) is considered to be very effective for enhancing Fp at low temperatures under a high field.

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