Manipulating compositional stoichiometry in high-temperature superconductors to enhance critical currents under high magnetic fields
Gurev V.V.1, Krylov V.E.1, Kulikov I.V.1, Abdyuhanov I.M.2, Alekseev M.V.2, Belotelova Yu.N.2, Konovalov P.V.2, Lukyanov P.A.2, Maltseva M.V.2, Nikolaev S.N.1, Shavkin S.V.1
1National Research Center “Kurchatov Institute”, Moscow, Russia
2A.A. Bochvar All-Russia Advanced Research Institute for Inorganic Materials, Moscow, Russia
Email: GuryevVV@mail.ru
The influence of the deviation in the target chemical composition from the stoichiometric ratios of yttrium-barium-copper oxide (YBCO) Y : Ba : Cu = 1 : 2 : 3 on the properties of coated conductors fabricated through pulsed laser deposition was investigated. An optimal target composition was empirically established, facilitating both a reduction in anisotropy and an enhancement of the critical current at liquid helium temperatures and under intense magnetic fields. Keywords: YBCO, coated conductor, pinning centers, anisotropy, target.
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