FLUORESCENCE ANALYSIS AND GROWTH OF BI-SR-CA-CU-O SUPERCONDUCTING THIN-FILMS

The plume generated by the Pulsed Laser Deposition (PLD) has been anal yzed with an Optical Multichannel Analyser (OMA). A Nd-YAG laser sourc e operating at 532 nm has been used to grow Bi-Sr-Ca-Cu-O (BSCCO) supe rconducting thin films from a 2:2:2:3 Pb-doped BSCCO target. The analy sis has also been carried out while growing the BSCCO films on MgO sub strates. The OMA spectra report the presence of excited species, neutr als and ionized, within the plume produced by ablation. The spectra re corded at different distancies from the target and at different oxygen pressures give indications on the nature and the velocities of the sp ecies ejected from the target.