23aA1 Crystal Growth of Y_yNd_<1-y>Ba_2Cu_3O_x Superconductors

Abstract

The pseudo-binary Y/NdBa_2Cu_3O_x-Ba_3Cu_<10>O_<13> phase diagrams and the crystallization of Y/NdBa_2Cu_3O_x have been in situ observed using high-temperature optical microscope in air. Dendritic growth occurred at the cooling rate of 5℃/min, but plate-like crystals grew by holding the temperature at 993℃. Y-rich and Nd-rich crystals were grown at the higher and lower temperature regions in the horizontal furnace, respectively.