Multilayer Flexible Oxide Superconducting Tapes
Superconducting Y-Ba-Cu-O films have been grown on mirror-finished flexible stainless steel substrates. Plasma assisted laser deposition (PLD) technique enabled us to grow these films at a reduced substrate temperature of 550°C. Superconducting properties of these as-deposited films depend largely on the surface condition of the substrate. In-situ oxidation of the substrate, Ar ion milling, and buffer layer growth, prior to Y-Ba-Cu-O deposition, produced films with critical temperatures ranging from 78–83K. Critical currents of 3 × 103–104 A/cm2 at 40K have been obtained. Scanning electron microscopy and Auger spectroscopy have been utilized to study the surface morphology and the interfacial diffusion of the films.
KeywordsCritical Temperature Critical Current Oxygen Plasma Laser Evaporation Superconducting Property
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