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In-field performance and flux pinning mechanism of pulsed laser deposition grown BaSnO3/GdBa2Cu3O7-U+03B4 nanocomposite coated conductors by SuperOx

Journal Contribution - Journal Article

Subtitle:In-field performance and flux pinning mechanism of pulsed laser deposition grown BaSnO3/GdBa2Cu3O7-delta nanocomposite coated conductors by SuperOx
We investigate the field, angle and temperature dependence of the full-width critical current, I-c, of pulsed laser deposition-grown GdBa2Cu3O7 coated conductors with and without additional 6 mol% BaSnO3 (BSO) nanoparticles fabricated by SuperOx. The transport characteristics measured from 7 to 77 K and in applied magnetic fields of up to 6 T are complemented by scanning transmission electron microscopy. This combined approach allows for further insight into the vortex pinning mechanism and helps with understanding the enhancement in I-c. An exemplary scaling of the pinning force curves versus field at different temperatures confirms the additional contribution to pinning by the BSO nanoparticles. Through the temperature dependence of I-c, the weak and strong pinning contributions are determined: strong pinning dominates over almost the entire temperature range especially near the matching field of 1 T, where the largest enhancement in I-c is achieved.
Journal: Superconductor Science and Technology
ISSN: 0953-2048
Issue: 9
Volume: 32
Number of pages: 1
Publication year:2019