Nano‐engineered pinning centres in YBCO superconducting films

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Colleges, School and Institutes

Abstract

For practical applications of superconducting materials in applied magnetic fields, artificial pinning centres in addition to natural ones are required to oppose the Lorentz force. These pinning centres are actually various types of defects in the superconductor matrix. The pinning centres can be categorised on their dimension (volume, surface or point) and on their character (normal cores or Δκ cores). Different samples have been produced by Pulsed Laser Deposition, with various thicknesses, temperatures and nanostructured additions to the superconducting matrix. They have been characterized by SQUID Magnetic Properties Measurement System and Physical Properties Measurement System, as well as by Transmission Electron Microscopy (TEM). Correlations between pinning architecture, TEM images, and critical currents at various fields and field orientations will be shown for a large number of YBa2Cu3Ox films with various types and architectures of artificial pinning centres.

Details

Original languageEnglish
JournalPhysica C Superconductivity
Early online date11 Jun 2016
Publication statusE-pub ahead of print - 11 Jun 2016

Keywords

  • YBCO films, Pinning centres, Pinning potential, Critical current, Critical current anisotropy