Yttrium-enriched YBa2Cu3Ox thin films for coated conductors fabricated by pulsed laser deposition

► YBCO films were fabricated by PLD from targets of various elemental compositions. ► The Y-enriched films contain yttria nanoparticles which provide efficient pinning. ► The best film has 5.5× higher jc(5 T,50 K) = 2.6MA/cm2 comparing with a reference film. ► The Y-enriched films remain c-oriented up to 500 nm. ► Films demonstrate no jc suppression with thickness and remarkable stability with time.