Structural and Superconducting Properties of Laser-Deposited (110)-Oriented YBa2Cu3O7-delta Thin Films After In Situ Annealing



: Paturi P, Rajala M, Palonen H, Huhtinen H

Publisher: IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC

: 2013

: IEEE Transactions on Applied Superconductivity

: IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY

: IEEE T APPL SUPERCON

: 3

: 23

: 3

: 4

: 1051-8223

DOI: https://doi.org/10.1109/TASC.2012.2233848


Deposition and in situ oxygen annealing of YBa2Cu3O7-delta (YBCO) thin films with < 110 > perpendicular to the plane of the film were systematically studied for the detailed structure and superconducting properties of the films. The films were grown on SrTiO3 (110) crystals with PrBa2Cu3O7-delta (110) (PrBCO) buffer layer by pulsed laser deposition, and afterwards in situ annealed in normal O-2 pressure at different temperatures between 550 degrees C and 925 degrees C. It was found that superconducting properties cannot be induced in the (110) oriented phase with annealing; instead high-temperature annealing rearranged some of the material in the films to (103) and (001) orientations, which were found partly superconducting even at 90 K.



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