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Using infrared spectroscopic ellipsometry (IRSE), the optical properties of the Ba0.9Sr0.1TiO3 (BST) ferroelectric thin films with different film thicknesses on Pt/Ti/SiO2/Si substrates prepared by a modified sol-gel method have been investigated in the 2.512.6m wavelength range. By fitting the measured ellipsometric parameter ( and ��) data with a three-phase model (Air/BST/Pt) and the classical...
Abstract. Stoichiometric and titanium-excess nanocrystalline barium titanates were synthesized using a hydrothermal process at various hydrothermal temperatures and with further heat treatment at 500C and 900C. Owing to the different process conditions, the excess titanium exists in different states and configurations within the nanocrystalline BaTiO3 matrix; this was demonstrated by X-ray diffraction,...
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