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Low-cost architecture for iron-based coated conductors.

L Piperno1,2, A Vannozzi1, F Rizzo1

  • 1ENEA, Frascati Research Centre, Via E. Fermi, 45, 00044 Frascati, Italy.

Iscience
|October 30, 2024
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Summary

Simplified iron-based coated conductors (IBS-CC) were developed using a single chemical buffer layer. This approach enables low-cost production of superconducting films with promising critical current densities.

Keywords:
Materials propertyMaterials sciencePhysics

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Area of Science:

  • Materials Science
  • Condensed Matter Physics
  • Superconductivity

Background:

  • Traditional iron-based coated conductors (IBS-CC) often require complex multilayered architectures.
  • Milder template crystalline quality requirements for IBS-CC materials allow for simplified designs.
  • A single buffer layer can suffice for protection and oriented growth of superconducting films.

Purpose of the Study:

  • To investigate the feasibility of a simplified IBS-CC architecture using a single buffer layer.
  • To prepare and characterize iron-based superconducting films grown on chemically deposited buffer layers.
  • To analyze the current transport properties of these simplified IBS-CCs.

Main Methods:

  • Pulsed Laser Deposition (PLD) was employed to grow Fe(Se,Te) films.
  • A single, chemically deposited CeO2-based buffer layer was used on commercial tapes.
  • Characterization included analysis of the buffer layer and detailed study of Fe(Se,Te) current transport properties.

Main Results:

  • Superconducting transitions were observed with a critical temperature (Tc0) around 12 K.
  • Critical current densities (Jc) reached approximately 0.1 MA cm-2 at 4.2 K and zero magnetic field.
  • The CeO2-based buffer layer effectively promoted oriented growth of the superconducting film.

Conclusions:

  • A simplified IBS-CC design utilizing a single chemical buffer layer is achievable.
  • This approach offers a pathway towards low-cost production of high-performance superconducting tapes.
  • The developed Fe(Se,Te) films exhibit promising superconducting properties suitable for various applications.