Modification of YBaCuO superconducting films by hydrogen implantation

The effects of hydrogen implantation into ceramic superconducting films have been studied. The superconductivity changed dramatically and is closely related to the substrates supporting the films. In the case of SrTiO 3 substrate the superconducting transition temperature, T c0 (the zero resistance temperature), is reduced while it is greatly raised up with YSZ substrate after 150 keV H + implantation. X-ray diffraction investigation has proved that the microstructure of the YBaCuO film with YSZ substrate has been modified by shortening the c-axis. The infrared absorption spectra have shown that the emergence of new vibrational frequencies of 2911, 2845 as well as 1441 and 1413 cm −1 representing the formation of CuH bonds at the different positions of the crystal cell may affect the superconductivity.