High Critical Current YBa2Cu3O7− Thick Films on Improved Rolling-Assisted Biaxially Textured Substrates (RABiTS™)
YBa2Cu3O7− (YBCO) films with thicknesses ranging from 1.0 to 6.4 m were deposited by pulsed laser deposition on rolling-assisted biaxially textured substrates (RABiTS). The RABiTS were of the configuration CeO2/YSZ/Y2O3/Ni–3 at.% W. As the YBCO film thickness increased, Ic continued to increase and reached ∼300 A/cm width for a 4.3 m-thick YBCO film. Commonly observed mechanisms for Jc decrease with increasing YBCO film thickness were not observed. Homogeneous microstructures obtained in even the thickest YBCO films, suggest that the Ic/width can still be enhanced considerably.
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