Speaker
Description
Y0.5Gd0.5Ba2Cu3O7-σ (YGBCO) and Ho0.5Gd0.5Ba2Cu3O7-σ (HGBCO) targets of similar density are prepared by solid-state reaction method. These targets are used to prepare superconducting thin film respectively using pulsed laser deposition (PLD). During the experiment, we alter laser energy by changing optical lens. X-Ray diffraction (XRD) is adopted to analyze the structure and texture of R0.5Gd0.5Ba2Cu3O7-σ (RGBCO, R=Y, Ho) thin film. Also, atomic force microscopy (AFM) and scanning electron microscopy (SEM) are used to observe the surface morphology, and superconducting current is measured in 77K by employing standard four-probe method. The laser energy density and different doping element can affect properties of YRBCO thin film, which may be related to target particle ejection process and size of rare earth atoms.