A microstructure analysis on the effect of varying deposition temperatures in the preparation of MgB2 thin films using thermal evaporation

Abstract

MgB₂ thin film was prepared at different deposition temperatures (700°C, 800°C, and 900°C). SEM micrographs of MgB₂ thin film revealed that as the temperature of the deposition increases, the hexagonal crystals are formed, while the vacuum pressure and deposition time are held constant. The presence of the MgO phase diminishes as the MgB₂ phase becames prominent. As a consequence of an increase in the deposition temperature, the thin film became less porous, the thickness of the film decreased, the x-ray spectra of MgB₂ and MgO also decreased.