Abstract
Er5Ba7Cu12Oy thin film is a high-temperature superconductor material (Tc=93 K). The growth morphologies of Er5Ba7Cu12Oy thin films on various substrates were studied by scanning electron microscopy. The films were prepared by molecular beam deposition and postgrowth annealing. The Er5Ba7Cu12Oy thin films on LaAlO3 (100) [and SrTiO3 (100)] substrates showed small amount of (100) oriented grains on top of a (001) epilayer if the films were annealed in the 850–865 °C range (film thickness=0.4 μm). The (001) oriented Er5Ba7Cu12Oy/cubic-ZrO2(100) thin films showed a ‘‘spherullite’’-type growth morphology. On MgO (100) [and cubic-ZrO2(100)] substrates, Er5Ba7Cu12Oy thin films with mixed (010) and (001) growth orientations were obtained.
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