Laser ablation of YBa2Cu3O7-x: the wavelength dependence

Formation mechanisms of atomic and oxide ions in a plume (laser-induced pla sma) produced by the laser ablation of a YBa2Cu3O7-x (YBCO) target was stud ied by time-of-flight (TOF) analysis. The dependence of the TOF spectra on the laser wavelengths (266 nm and 1064 nm) was examined to elucidate photoc hemical phenomena in the plume. Significant changes in the relative enrichm ent of metal oxide and oxygen ions as well as their TOF distributions were observed by the injection of an oxygen jet to the plume, which induces reac tive scattering of the YBCO plume and the oxygen jet.